Two mark exercise problems V — task. Mathematics State Board, Class 8.

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1. Subtract:

$-2(xy)^2(y^3 + 7x^2y + 5)$ from

$5y^2(x^2y^3 - 2x^4y + 10x^2)$ .

Answer:

Difference

$=$

$7x^2y^5 - 4x^4y^3 + 60x^2y^2$
$7x^2y^5 - 4x^4y^3 - 60x^2y^2$
$7x^2y^5 + 4x^4y^3 + 60x^2y^2$
$7x^2y^5 + 4x^4y^3 - 60x^2y^2$

2. Multiply

$(4x^2 + 9)$ and

$(3x - 2)$ .

Answer:

Product

$=$

$12x^3 - 8x^2 + 27x + 18$
$12x^3 - 8x^2 + 27x - 18$
$12x^3 - 8x^2 - 27x - 18$
$12x^3 + 8x^2 + 27x - 18$

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