SOLVE THE FOLLOWING
(a-b) ² = a² - 2b+ b ²
4-a²
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Step-by-step explanation:
a^2 + b^2 -2ab = a^2 - 2b +b^2
a^2 + b^2 -2ab - a^2 + 2b - b^2=0
-2ab + 2b =0
-2ab = -2b
2ab = 2b
a=1
4 - a^2
2^2 - a^2 { a^2 -B^2 = (a+b)(a-b) }
(2+a)(2-a)
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