If -5 is a root of the quadratic equation 2x' + px -15 = 0, and the quadratic equation
p(2 + x) + k = O has equal roots, find the value of k.
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Answer:
p=7, k=21
Step-by-step explanation:
2x²+px-15=0
x= -5
2(-5)²+p(-5)-15=0
2(25)-5p-15=0
50-5p-15=0
35-5p=0
-5p= -35
5p=35
p=35/5
p=7
p(2+x)+k=0
7{2+(-5)}+k=0
7(-3)+k=0
-21+k=0
k=21
Answered by
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Answer:
there's a little change in the question... hope it 'll help..
Step-by-step explanation:
the question is as follows...
QUESTION) if - 4 is a root of the quadratic equation x² + 3x - 4 = 0 and the quadratic equation x² + 3x + k = 0 has equal roots find the value of k.
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