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 ▸Write 2x^2 + 16x + 26 in the form a(x + d)^2 + e where a, d, and e are integers.
Expand and simplify the following: (2x+3)(2x+5)
How do you use the product rule?
Two apples and three bananas cost a total of £1.30. Seven apples and one banana cost a total of £1.70. Find the cost of a) one apple and b) one banana.