Question

11. A quadratic polynomial, whose zeores are -4 and -5, is (a) x²-9x + 20 (b) x² + 9x + 20 (c) x²-9x- 20 (d) x² + 9x- 20

Answer 1

Answer:

b) x² + 9x + 20

Step-by-step explanation:

x² + 9x + 20 = 0

x² + 5x + 4x + 20 = 0

x(x+5) +4(x+5) = 0

(x+4)(x+5) = 0

x = -4 or x=-5

Answer 2

Answer:

b option is the right answer