morganzahn16
14.03.2020 •
Mathematics
A, B, and C are polynomials, where: A = 3x – 4 B = x + 7 C = x2 + 2 What is A2 – (B + C) in simplest form? 8x2 – 25x + 7 8x2– 25x + 11 10x2 – 25x + 7 10x2 – 25x + 11
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Ответ:
8x²-25x+7
Step-by-step explanation:
A² = (3x-4)(3x-4)
A² = 3x(3x-4) - 4(3x-4)
A² = 9x² - 12x - 12x + 16
A² = 9x² - 24x + 16
while
B+C = (x+7) + (x² +2)
B+C = x+7+x²+2
B+C = x²+x+9
Therefore:
A² - (B+C) = 9x² - 24x + 16 - (x²+x+9)
= 9x² - 24x + 16 - x² - x - 9
= 8x²-25x+7
Ответ:
A
Step-by-step explanation:
I took the assignment on Ed gen uity
Ответ:
C
Step-by-step
-29a+8a= -21a and -8-7= -15