Question

show that x = -1 is a zero of the polynomial p (x) = x2 + 5x + 4 ( need step by step solution )​

Answer 1

Answer:

Zeroes of polynomial x

2

+5x−204

Using common factor method

x

2

+17x−12x−204

=x(x+17)−12(x+17)

=(x−12)(x+17)

To find zeroes of polynomial, we can equate the factor equal to zero.

∴(x−12)=0 ; (x+17)=0

x=12 ; x=−17

(12,−17) zeroes of polynomial.

Hence, the answer is (12,−17).

Step-by-step explanation:

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Step-by-step explanation:

Answer 2

Answer:

p(x) = x2 + 5x + 4

x= -1

p(-1) = (-1) 2 + 5×-1 + 4

= -1×-1 + (-5) + 4

= +1 -5 +4

= 5-5

= 0