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Question 1 (v)

Find the roots of the quadratic equations by using the quadratic formula in the following question.


x2+22x6=0

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Solution

Given equation is x2+22x6=0
on comparing with ax2 + bx + c = 0, we have
a = 1, b = 22 and c = -6
By quadratic formula, x=b±b24ac2a
=22±8+242=22±422
=2+22, 222=2,32
So, 32 and 2 are the roots of the given equation


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