x2 -y2 -9z2+6yz factorise this urgent
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Answered by
51
x2-y2-9z2+6yz
x2-y2-(3z) 2+2(y)(3z)
x2-(y-3z) ^2
a^2-b^2=a+b(a-b)
(x-y+3z)(x+y-3z)
x2-y2-(3z) 2+2(y)(3z)
x2-(y-3z) ^2
a^2-b^2=a+b(a-b)
(x-y+3z)(x+y-3z)
Answered by
11
Make perfect square out of y and 3z and see above attached
Hope it helps
Hope it helps
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