1.

(5x +7) (5x +7) is(A) 25x2 + 70x + 49(B) 25%-70x + 49(C) 5x2 + 70x + 7(D) 5x2-70x + 7

Answer»

(5x+7)(5x+7)

= 25x²+35x+35x+49

= 25x²+70x+49



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