8x2+7x=0,0 and -2 justify and write whether the given value are the roots of the quadratic equations.
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Answer:
Given,
2
x
2
+7x+5
2
=0
or,
2
x
2
+2x+5x+5
2
=0
or, x
2
(x+
2
)+5(x+
2
)=0
or, (x
2
+5)(x+
2
)=0
⇒x=−
2
5
,−
2
.
These are the required roots.
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