Question

(iii) Solve the quadratic equation 5x2 + 13x + 8 = 0 using formula method.

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Answer 1

Step-by-step explanation:

5x²+13x+8=0

5x²+5x+8x+8=0

5x(x+1)+8(x+1)=0

(5x+8)(x+1)=0

5x+8=0

x=-8/5

x+1=0

x=-1

Answer 2

$5x {}^{2} + 13x + 8 = 0 \\ 5x {}^{2} + 5x + 8x + 8 = 0 \\ 5x(x + 1) + 8(x + 1) = 0 \\ (5x + 8)(x + 1) = 0 \\ 5x + 8 = 0 \\ x = \frac{8}{5} \\ x + 1 = 0 \\ x = 1$