Factorise (9a²-49)

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Factorise (9a²-49)

Posted by Nishi Shah 2 years ago

CBSE > Class 09 > Mathematics

2 answers

Sylwia Prakash 2 years ago

(9a² - 49 ) By the formula a² - b² (a-b)(a+b ) 9a²=(3a)² , 49=(7)² (3a)²- (7)²=(3a- 7)(3a+7)

1Thank You

Garima Saini 2 years ago

9a²-49 Using identity: a²-b² = (a-b) (a+b) = (3a)²-(7)² = (3a-7)(3a+7) answer

1Thank You

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