Question

Check whether x=√2,-2√2are roots of x²+√2x-4=0

Answer 1

whan x=√2 Then,
(√2)2+√2(√2)-4==2+2-4===4-4=0


x=√2 us satisfied THIS equation
Now check on x= -2√2

(-2√2) square + √2(-2√2)-4
= 4 × 2+ 2(-2) - 4
= 8- 4- 4
= 8 - 8= 0
HANCE x two root √2,-2√2 are both satisfied given equation

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