Question

Show that x = − 3 is a solution of 2x2 + 5x − 3 = 0.

Answer 1

Hey Mate
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The given equation is 2x2 + 5x − 3 = 0.

For x = − 3, we have:

L.H.S = 2(− 3)2 + 5 (− 3) − 3

= 2(9) + 5(− 3) − 3

= 18 − 15 − 3

= 18 − 18 = 0 = R.H.S

Hence, x = − 3 is a solution of the equation 2x2 + 5x − 3 = 0.

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Answer 2

ok p(x)=2x²+5x-3
LHS=>2x²+5x-3=p(x)
p(-3)=18-18
p(-3)=0
hence proved




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