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mangowammy
28.01.2020 •
Mathematics
Which algebraic expression is equivalent to the expression below?
[2x+1-(4x+6)]^2
a. 4x2 + 20x + 25
b. 36x2 - 60x + 25
c. 36x2 + 84x + 49
d. 4x2 - 28x + 49
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Ответ:
A. 4x²+20x+25
Step-by-step explanation:
Because of PEMDAS, you calculate the value inside of the parenthesis first, so you expand [2x+1-(4x+6)]:
2x+1-4x-6 = -2x-5.
Then apply the exponent:
(-2x-5)² = (-2x-5)(-2x-5) = 4x²+10x+10x+25 = 4x²+20x+25
Ответ:
answer:
they are congruent through translation and reflection.
reason:
the sides measure the same.