Question

fill in the blank: The zero of the polynomial x2+2x-15=​

Answer 1

Step-by-step explanation:

${x}^{2} + 2x - 15 = 0$

${x}^{2} + 5x - 3x - 15 = 0$

$x(x + 5) - 3(x + 5) = 0$

$(x - 3)(x + 5) = 0$

$x = 3 \: \: and \: x = - 5 \: is \: the \: solution$

Answer 2

Answer:

So, the zeros of the polynomial are  x=3 or x=-5

Step-by-step explanation:

x²+2x-15=0

x²+5x-3x-15=o

x(x+5)-3(x+5)=0

(x-3)(x+5)

x=3 or x=-5