Question

Factor completely 100x2 − 49. (6 points)

(7x − 10)(7x + 10)
(7x − 10)(7x − 10)
(10x − 7)(10x + 7)
(10x − 7)(10x − 7)

Answer 1

What are the solutions of 2x2 + 3x= −8? (6 points)

the quantity negative 3 plus or minus i square root of 41 all over 4
the quantity negative 3 plus or minus i square root of 55 all over 4
the quantity negative 3 plus or minus i square root of 21 all over 4
the quantity negative 3 plus or minus i square root of 15 all over 4

Answer 2

HI!!

Answer 3

the first one is C because the answer is always C
also because \[a^2-b^2=(a+b)(a-b)\]

Answer 4

for the second one, use the quadratic formula
can't really read those answers though, i am sure one of them is right

Answer 5

thanks!!!!

Answer 6

What are the solutions of 2x2 + 16x + 50 = 0? (6 points)

−4 ± i
−4 ± 3i
−2 ± 4i
−3 ± 4i

Answer 7

\[2x^2+16x+50=0\] divide by 2 and start with \[x^2+8x+25=0\]

Answer 8

since 8 is even, easiest to complete the square
subtract 25 and get \[x^2+8x=-25\] as step one
then complete the square
do you know how to do that?

Answer 9

oh ok i got it thank you! A right?