Question

x2 (1-3y2) + x(xy2-2x) -3y(y-4x2y) simplify
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Answer 1

Answer (i) (x+y+z)(x-y-z).

(x+y+z)(x−y−z) ( x + y + z ) ( x - y - z ).

Expand

(x+y+z)(x−y−z) ( x + y + z ) ( x - y - z ) by multiplying each term in term in the first expression by each term in the second expression.

Simplify terms

²-y²-yz-zy-z²

Subtract zy from -yz

x²-y²-2yz-z²

(ii) x²(x-3y²)-xy(y²-2xy)-x(y³-5x²)

x³-3x²y²-xy³+2x²y²-xy³+5x³

6x³-2xy³-x²y²

(iii) -7x²-2x(-7x²-2

Answer 2

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