Verified answer

Answer:

Option D

Explanation

Given equation,

√2x^2+9=9

squaring on both sides

2x^4+81+18√2x^2=81

2x^4+18√2x^2=0

2(x^4+9√2x^2)=0

x^4+9√2x^2=0

x^2(x^2+9√2)=0

x^2=0,x^2+9√2=0

x=0,x=6

Answer:

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Step-by-step explanation:

what is the value of k, if 1/2 is a root of the eqn x^2+kx-5/4=0 ?

What are the roots of the quadratic equation (there is a root over no.s)

√2x^2+9=9? A) 6, - 6 (B) 3, -3 (C) 2, -2 -