(i) 50x2 – 2(x – 2)2
(ii) (x – 2)(x + 2) + 3
Answer :
(i) 50x2 – 2(x – 2)2
Take out common in all terms,
2[25x2 – (x – 2)2]
2[(5x)2 – (x – 2)2]
We know that, a2 – b2 = (a + b) (a – b)
2[(5x + x – 2) (5x – x + 2)]
2[(6x – 2) (4x + 2)]
2(6x – 2) (4x + 2)
(ii) (x – 2)(x + 2) + 3
We know that, a2 – b2 = (a + b) (a – b)
(x2 – 22) + 3
X2 – 4 + 3
X2 – 1
Then,
(x + 1) (x – 1)
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