MATH 124 Test 2 questions and
answers rated A+
I squared=... - correct answer ✔✔ -1
square root of -1 (√-1)=... - correct answer ✔✔ i
The complex number form - correct answer ✔✔ a+bi
is 6i a complex number? - correct answer ✔✔ yes, o+6i
is 8 a complex number? - correct answer ✔✔ yes, 8+0i
is 8+6i/2 a complex number? - correct answer ✔✔ no
how add/subtract complex numbers? - correct answer ✔✔ just put real and imaginary parts
together.
when subtracting complex numbers, do this first... - correct answer ✔✔ distribute the negative
and make an addition problem
when multiplying 2 complex numbers, remember that i squared =.... - correct answer ✔✔ -1,
then multiply by number attached
when multiplying conjugate, middle part will____. Then, to write as complex number, write
as_____. - correct answer ✔✔ cancel out, write as 0i
, How to divide two complex numbers? - correct answer ✔✔ multiply top and bottom of fraction
by conjugate of the denominator.
dividing complex numbers: if answer is 32+37i/ 37, how would this be written in complex
number form? - correct answer ✔✔ 32/37+7/37 i
Quadratic equation standard form - correct answer ✔✔
quadratic formula theorem - correct answer ✔✔ a(x-x1)(x-x2)
quadratic formula - correct answer ✔✔ X1 and X2=...
What are X1 and X2 in the quadratic formula? - correct answer ✔✔ the zeros (where y=0)
vertex - correct answer ✔✔ mid point of a parabola, between the two zeros
When finding zeros, what should you try to do first before performing quadratic equation? -
correct answer ✔✔ factor
How many points are needed to graph a parabola and what are they? - correct answer ✔✔ 3;
the vertex, and the two y=0's
if a is greater than 1, the covexity will be... - correct answer ✔✔ positive
if a is less than 1, the convexity will be... - correct answer ✔✔ negative
answers rated A+
I squared=... - correct answer ✔✔ -1
square root of -1 (√-1)=... - correct answer ✔✔ i
The complex number form - correct answer ✔✔ a+bi
is 6i a complex number? - correct answer ✔✔ yes, o+6i
is 8 a complex number? - correct answer ✔✔ yes, 8+0i
is 8+6i/2 a complex number? - correct answer ✔✔ no
how add/subtract complex numbers? - correct answer ✔✔ just put real and imaginary parts
together.
when subtracting complex numbers, do this first... - correct answer ✔✔ distribute the negative
and make an addition problem
when multiplying 2 complex numbers, remember that i squared =.... - correct answer ✔✔ -1,
then multiply by number attached
when multiplying conjugate, middle part will____. Then, to write as complex number, write
as_____. - correct answer ✔✔ cancel out, write as 0i
, How to divide two complex numbers? - correct answer ✔✔ multiply top and bottom of fraction
by conjugate of the denominator.
dividing complex numbers: if answer is 32+37i/ 37, how would this be written in complex
number form? - correct answer ✔✔ 32/37+7/37 i
Quadratic equation standard form - correct answer ✔✔
quadratic formula theorem - correct answer ✔✔ a(x-x1)(x-x2)
quadratic formula - correct answer ✔✔ X1 and X2=...
What are X1 and X2 in the quadratic formula? - correct answer ✔✔ the zeros (where y=0)
vertex - correct answer ✔✔ mid point of a parabola, between the two zeros
When finding zeros, what should you try to do first before performing quadratic equation? -
correct answer ✔✔ factor
How many points are needed to graph a parabola and what are they? - correct answer ✔✔ 3;
the vertex, and the two y=0's
if a is greater than 1, the covexity will be... - correct answer ✔✔ positive
if a is less than 1, the convexity will be... - correct answer ✔✔ negative
