Find x for: x^2 + 5x = 5

x2 + 5x = 5 Make equal to 0. x2 +5x - 5 = 0 Recognise that you need to use the quadratic equation. (-b ± sqrt(b2-4ac))/2 sub in. (-5 ± sqrt(52-41-5))/2 (-5 ± sqrt(45))/2 x = (-5 + 6.7)/2, x = (-5 - 6.7)/2 x = 0.85, x = -5.85

LC

Related Maths GCSE answers

All answers ▸

If 3(x-2)-4(x+5)=10 , what is the value of x?


Solve the inequality 4m +3 > 15


Given that your grade for your computing is based on 5 coursework that weigh differently, and you know the results of 4: 80, 75, 50 and 90 which weighs 10%, 20%, 45% and 5%. What grade do you need in your last coursework to achieve at least a B (70%)?


Work out the value 125^(-2/3) (A* Exam Q)