Question

Factorise: x²+12x-28​

Answer 1

Answer:

${x}^{2} + 12x - 28$

$= {x}^{2} + (14 - 2)x - 28$

$= {x}^{2} + 14x - 2x - 28$

$= x(x + 14) - 2( x + 14)$

$= (x + 14)(x - 2)$

Step-by-step explanation:

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Answer 2

Answer:

Hence, the roots are x=2 and x=-14

Step-by-step explanation:

x^2+12x-28=0

x^2+14x-2x-28=0

x(x+14)-2(x+14)=0

(x+14)(x-2)=0

x+14=0 and x-2=0

x=-14 and x=2