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Question

On solving 4x24a2x+(a4b4) = 0 we get value of x is equal to

A
a2±b22
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B
a22
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C
b22
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D
a2÷b22
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Solution

The correct option is A a2±b22
On comparing the equation with Ax2+Bx+C=0,
We get, A=4,B=4a2,C=a4b4
D
= B24AC =(4a2)2 4*4*(a4b4)
= 16a416a4+16b4= 16b4
x=B±D2A = 4(4a2)±16b42×4
= 4a2±4b28 = a2+b22 or a2b22

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