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.
PS
Related Maths GCSE answers
All answers ▸A shopkeeper compares the income from sales of a laptop in March and in April. The price in April was 1/5 more than in March. The number sold in April was 1/4 less than in March. By what fraction does income decrease from March to April?
Calculate 8^0
The width of a rectangle is X cm. The length is 1·5 cm more than the width. The perimeter of the rectangle is 17 cm. Write down an equation satisfied by X and solve it to find X.
A circular table top has diameter 140 cm. The volume of the table top is 17,150π cmᶟ. Calculate the thickness of the table top