Question

(X-1)²
(2x-3)²
(p-q)²
(4x-7)²​

Answer 1

(a-b)²=a²+b²-2ab

(x-1)²=x²+1²-2(x)(1)

= x²+1-2x

=x²-2x+1

(2x-3)²=2x²+3²-2(2x)(3)

=4x²+9-12x

=4x²-12x+9

(p-q)²=p²+q²-2pq

(4x-7)²=4x²+7²-2(4x)(7)

= 16x²+49-56x

= 16x²-56x+49

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