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Question

If x=1+2 then find the value of the expression x4x32x23x+1

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Solution

x=1+2
x4x32x23x+1
x2(x2x2)3x+1
x2(x2)(x+1)3x+1
(2+1)2(2+12)(2+1+1)3x+1
(2+1)(2+1)(21)(2+2)3x+1
(2+1)(21)(2+2)3x+1
(2+1)(2+2)3(2+1)+12+32+2323+1
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