If a= 1 and b = 2, then find the value of -5abx3a 52
OR
Using suitable identities, find the value of 48x52.
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48×52
(50-2) (50+2)
The identity is x+a x+b = x sq. +(a+b) x×ab
(50) sq. + (-2+2)50+-2×2
2500+0-4
= 2496
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