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Find the zeroes of the quadratic polynomial x^2 + 8x + 15.

x2+8x+15 = (x+3)(x+5)

So, the value of x2+8x+15 is zero when x2+8x+15 = 0 i.e. x = -3 or x = -5.

Piyush S. A Level Maths tutor, IB Maths tutor, 11 Plus Maths tutor, 1...

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