Question

vii) Solve: (4x2–3x + 7) –(x2 + 8x –5)​

Answer 1

Answer:

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Step-by-step explanation:

Solution:

(4x2 - 2x) - (-5x2 - 8x)

= 4x2 - 2x + 5x2 + 8x.

= 4x2 + 5x2 - 2x + 8x.

= 9x2 + 6x.

= 3x(3x + 2).

Answer: 3x(3x + 2)

Answer 2

Answer:

$3x^2 - 11x + 12$ is the required value of $(4x^2 - 3x + 7) - (x^2 +8x -5)$.

Step-by-step explanation:

Explanation:

Given, $(4x^2 - 3x + 7) - (x^2 +8x -5)$

First we open the brackets,

$(4x^2 - 3x + 7 - x^2 - 8x + 5)$

⇒$(4x^2 - x^2) -(3x + 8x ) +(7+ 5)$

⇒ $3x^2 - 11x + 12$

Final answer:

Hence, the value of $(4x^2 - 3x + 7) - (x^2 +8x -5)$  is ( $3x^2 - 11x + 12$).

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