Question

(4) Which of the following quadratic equation has roots -3 and -5?
(a) x2 - 8x + 15 = 0
(b) x2 8x 150
(c) x2 + 8x 15 = 0
(d) x2 8x 15 = 0​

Answer 1

${x}^{2} + 8x + 15 = 0 \\ \\ = > {x}^{2} + 5x + 3x + 15 = 0 \\ \\ = > x(x + 5) + 3(x + 5) = 0 \\ \\ = > (x + 5)(x + 3) = 0 \\ \\ = > x = - 5 \: and \: - 3$

So, option (c) is the correct answer ✔✔

Answer 2

Answer:

c is the correct option

Step-by-step explanation:

x^+8x+15=0

x^+3x+5x+15=0

X(X+3)5(X+3)=0

(X+3)=0 , (X+5)=0

X=-3 ,X=-5