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if x^3 + 4x =8 find value of x^7 +64x^2 a)132 b)128 c)216 d)125 if x^3 + 4x =8 find value of x^7 +64x^2 a)132 b)128 c)216 d)125
if x^3 + 4x =8 find value of x^7 +64x^2
a)132
b)128
c)216
d)125
x^3 +4x=8 square the equationx^6 +16x^2 +8x^4=64 multiply with xx^7+16x^3+8x^5-64x=0now x^7+64x^2 put value of x^764x-16x^3-8x^5+64x^264x-8x^2(x^3+4x)+16x^3+64x^264x-64x^2+16x^3+64x^264x+16x^316(x^3+4x)=16*8=128ans is BSher Mohammadfaculty askiitians
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