Math, asked by kalpnasingh, 1 year ago

one of the roots of quadratic equation 2x²+kx-2=0 is -2,find k.(ans: k=3).

Answers

Answered by sanya55

It's easy just put the value of x= -2 in the equation

It becomes
2(-2)(-2) + k(-2) -2=0
8-2k -2=0
6-2k =0
2k =6
Or k=3

Which is the required answer

Hope it helps you

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kalpnasingh: mark brainliest i don't understand.

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sanya55: it means that on the top of the answer there is an option MArk as the brainliest

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kalpnasingh: okkk now i u. stand .

sanya55: gud

sanya55: and all the best for your board exams

kalpnasingh: thank u

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