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Question

Solve the following quadratic equation. 5x24x7=0

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Solution

The two roots of the quadratic equation ax2+bx+c=0 are given by,

x=b±b24ac2a

For the given equation 5x24x7=0,

b24ac=(4)24(5)(7)=16+140=156

So, the roots are,
x=4±1562(5)

x=4±23910

x=2±395

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