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If y = -1 is a …

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If y = -1 is a zero of the polynomial q(y) =4y³+ky²-y-1 then find the value of k.

Posted by Aditya Singh Chib 1 year, 5 months ago

CBSE > Class 09 > Mathematics

2 answers

Bhavya Singla 1 year, 5 months ago

Q(y) = 4y³ +ky²-y-1 Y=-1 Q(-1) = 4(-1)³+k(-1)²-(-1)-1 = 4(-1)+k(1)+1-1 = -4+k+0 -4+k =0 K =4

Bhumesh Garg 1 year, 5 months ago

q(-1) =0 4(-1) ³+k(-1) ²-(-1) -1=0 4 x -1 +k x 1 +1 - 1=0 -4+k+0=0 -4+k=0 k=4

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