How would I solve this?

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asked Nov 2, 2018 14.2k views

1 Answer

Mcfly · Answer 1 · 2018-11-07T14:56:48+0000

subsitute 7 for x

√(2k²+17)-7=0
add 7 to both sides
√(2k²+17)=7
squaer both sides
2k²+17=49
minus 17 both sides
2k²=32
divide both sides by 2
k²=16
square both sides
k=+/-4

we are given that k>0 so k=4

answer is C

How would I solve this?

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