factorise : 9x² - y²
Answers
Answered by
5
Answer:
(3x+y)(3x-y)
Step-by-step explanation:
9x²-y²
﹦﹙3x﹚²-﹙y﹚²
﹦(3x+y)(3x-y)﹛a²- b²﹦(a+b)(a-b)﹜
(Ans)
Answered by
1
Step-by-step explanation:
9x² - y²
= (3x)² - (y)² [ since , 3² (3*3 =9]
= (3x + y) (3x - y) [ using identity , (a+b)(a-b) = a²-b² ]
Answer :
(3x + y) (3x - y)
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