Question

Evaluate :

(i) (6x - 7) (6x + 7)

(ii) (6x + 5y )²

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Answer 1

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Answer 2

ANSWER :

1. 36x²- 49
2. 36x²+25y²+60xy.

EXPLANATION :

1. (6x-7)(6x+7)

= (6x)²-7²

= 36x²- 49

2. ( 6x + 5y )²

= (6x)²+(5y)²+2(6x)(5y)

= 36x²+25y²+60xy.

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