Question

x²+8x+15=0. solve by factorisation
method​

Answer 1

Answer:

x² + 8x + 15 = 0

x² + 5x + 3x + 15 = 0

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

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

x + 3 = 0

x = - 3

and

x + 5 = 0

x = - 5

Answer 2

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${x}^{2} + 8x + 15 = 0$

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

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

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

$(x + 5) = 0 \: \: \: \: \: \: \: (x + 3) = 0$

$x = - 5 \: \: \: \: \: \: \: \: x = - 3$