Question 1 (v)
Find the roots of the quadratic equations by using the quadratic formula in the following question.
x2+2√2x−6=0
Given equation is x2+2√2x−6=0
on comparing with ax2 + bx + c = 0, we have
a = 1, b = 2√2 and c = -6
By quadratic formula, x=−b±√b2−4ac2a
=−2√2±√8+242=−2√2±4√22
=−√2+2√2, −√2−2√2=√2,−3√2
So, −3√2 and √2 are the roots of the given equation