Question

If x²+ 8x +15 = (x+ k) (x +3), then the value of k is​

Answer 1

Step-by-step explanation:

Value of k is 5

Take roots of quadratic equation and you will get answer 5

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Answer 2

Answer:

x²+ 8x +15

= x²+(5+3)x+15

= x²+5x+3x+15

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

= (x+5)(x+3)

since,

x²+ 8x +15= (x+ k) (x +3)

therefore,

k=5

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