Factrorise :-
9(a +b)² - 12(a²-b²) + 4(a-b)²
Hir19:
9(a +b)² - 12(a²-b²) + 4(a-b)²
yeah?
9(a +b)² - 12(a²-b²) + 4(a-b)² =9(a^2+b^2+2ab)-12a^2+12b^2+4(a^2+b^2-2ab) = 9a^2+2b^2+18ab-12a^2+12b^2+4a^2+4b^2-8ab =a^2+25b^2+10ab =a^2+(5b)^2+2.a.5b=(a+5b)^2
Answers
Answered by
0
={3(a+b)}²-2*{3(a+b)}{2(a-b)}+{2(a-b)}²
={3a+3b-2a+2b}²
=(a+5b)²...............(ans)
={3a+3b-2a+2b}²
=(a+5b)²...............(ans)
Answered by
1
Answer:
let(A+b) =X and (a-b) =ye so the following equation
9x^2-12xy-4y^2
3x(3x-2y) -2y(3x-2y)
(3x-2y) (3x-2y)
{3(A+b) -2(a-b) }{3(A+b) -2(a-b) }
(3a+3b-2a-2b) (3a+3b-2a+2b)
(a+5b) (A+5b)
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