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Question

Question 1 (i)

Find the roots of the quadratic equations by using the quadratic formula in the following question2x23x5=0.

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Solution

Given equation is 2x23x5=0
On comparing with ax2 + bx + c = 0, we get
a = 2, b = - 3 and c = - 5
by quadratic formula, x=b±b24ac2a
x=(3)±(3)24(2)(5)2(2)=3±9+404
=3±494=3±74=104, 44 = 52, 1
So, 52 and – 1 are the roots of the given equation.


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