MATHEMATICS HIGH SCHOOL

What is A2 – (B + C) in simplest form?A=8x2 – 25x + 7
B=8x2– 25x + 11
C=10x2 – 25x + 7
D=10x2 – 25x + 11

A, B, and C are polynomials, where:
A = 3x – 4
B = x + 7
C = x2 + 2

Answers

Answer 1
Answer: A2 - (B + C) = (3x - 4)2 - ((x + 7)+ (x2 + 2))
A2 - (B + C) = 9x2 - 24x + 16 - (x2 + x + 9)
A2 - (B + C) = 9x2 - 24x + 16 - x2 - x - 9
A2 - (B + C) = 8x2 - 25x + 7

So, the answer is
A:
8x2 – 25x + 7
Answer 2
Answer:

Answer: 8x^2 - 25x + 7

Step-by-step explanation:

Here, A = 3x - 4, B = x + 7 and C = x^2 + 2

A^2 - (B + C)= (3x-4)^2-(x+7+x^2+2)     ( By putting the values)

= (3x)^2+ (4)^2- 2* 3x* 4- x- 7 - x^2 -2    ( solving the brackets)

=  9x^2+ 16 - 24x - x- 7 - x^2 -2

=  8x^2- 25x + 7        ( By operating like terms)

⇒ A^2 - (B + C) = 8x^2- 25x + 7

Thus, Option A is correct.

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Answers

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Answers

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