Factorise:
a-b - a^2 +b^2
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0
Answer:
If P = x + y + z and Q = 2x - y + 3z, find P + 2Q.
Step-by-step explanation:
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Answered by
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Answer:
=(a-b)(1-a-b)
Step-by-step explanation:
a-b-a^2+b^2=a-b-(a^2-b^2)
=(a-b)-{(a+b)(a-b)}. [. ' . (a^2-b^2=(a-b)(a+b)]
=(a-b){1-(a+b)}
=(a-b)(1-a-b)
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