Solve x^2 + 10x - 3 = 0
completing the square (x+5)2 -25 -3 =0 (x+5)2 -28 = 0 (x+5)2 = 28 x= ±2√7 -5
IH
Related Maths GCSE answers
All answers ▸When given an equation with both letters and numbers on each side of the equals sign, for instance 4x +3 = 5x - 3, how do you know what to do first?
Solve the simultaneous equations: 5x + 3y = 41 and 2x + 3y = 20 Do not use trial and error.
How do I rationalise the denominator? (Surds)
Solve this simultaneous equation: 3x + y = 10, x + y = 4