Question

If-1 is the zero of polynomials kx²+7x+12 then find the value of k

Answer 1

Answer:

-5

Step-by-step explanation:

p(x) = kx²+7x+12

[ -1 is the zero of polynomial which means it is a factor of p(x) ]

p(-1) = k{-1}^2+7(-1)+12=0

1k -7 +12 = 0

k + 5 =0

k= -5 { +5 becomes -5 as it goes to RHS}

therefore k= (-5)

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