Show x^2 + 8x +15 = 0 in the form of (x+b)^2 +c (complete the square) and then solve the equation
x2+8x +15 = 0
(x+4)2-16 +15=0
(x+4)2-1=0
(x+4)= (+/-)1
x = -3 or -5
OA
Related Maths GCSE answers
All answers ▸What are the possible value(s) of x for the following: x^2 + 3x - 54 = 0
Find the length of a side of the triangle (Pythagoras' Theorem) Two sides are of length 3cm and 4cm, find the length of the Hypotenuse.
A new car costs £12,000. It decreases in value by 5% each year for the first 5 years and then increases in value by 2% after that. How much does it cost after 7 years?
Solve the quadratic equation x^2+5x+6=0