Question

factorise ×^2+8×+15
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Answer 1

$\large\fbox\red{Answer}$

${x}^{2} + 8x + 15 \\ \\ = {x}^{2} + (5 + 3)x + 15 \\ \\ = {x}^{2} + 5x + 3x + 15 \\ \\ = x(x + 5) + 3(x + 5) \\ \\ = (x + 5)(x + 3)$

• Thnku ❣

Answer 2

Answer:

Step-by-step explanation:

x  

2

−8x+15

=x  

2

−5x−3x+15

=x(x−5)−3(x−5)

=(x−5)(x−3)