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29 votes
29 votes
Can uh help me in this


Can uh help me in this ​-example-1
User Spikeheap
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1 Answer

18 votes
18 votes

Answer:

Explanation:

b) a² - 1 + b(b - 2a) = a² -1 + b*b - b*2a {distributive property}

=a² - 1 + b² - 2ab

= (a² - 2ab + b² ) - 1

= (a - b)² - 1² {use identity x²-y²= (x+ y)(x -y)}

= (a - b + 1)(a -b +1)

b) 15 +8y + y² - 2x - x² = (y² + 8y + 15) - x² - 2x

= (y² + 5y + 3y + 15) - x(x + 2)

= [ y(y + 5) + 3(y +5)] - x(x + 2)

= [(y + 5)(y+3) ] - x(x +2)

User Sahib Yar
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