Factorise
49 (x + 1) square + 70 (x + 1) (y + 2) +25 (y+2) square.
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Step-by-step explanation:
49(x+1)²+70(x+1)(y+2)+25(y+2)²
= [7(x+1)]²+2.7(x+1).5(y+2)+[5(y+2)]²
= [7(x+1)+5(y+2)]²
= (7x+7+5y+10)²
= (7x+5y+17)²
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