Solve x^2 + 15x = - 50
-
x2 + 15 x + 50 = 0 (rearrange by adding 50 to both sides)
-
(x + 10)(x + 5) = 0 (factorise the quadratic equation)
-
x + 10 = 0 or x + 5 = 0 (for the above to equal zero, at least one of the bracketed terms must equal zero)
-
x = -10 or x = -5 (solving the two equations that result from step 3)
-
The solution is x = -10, x = -5
JS
Related Maths GCSE answers
All answers ▸Josie is paid £1200 per month. She is going to receive an increase of 4% in the amount she is paid. Work out how much money Josie we be paid each month after the increase.
What's the difference between a histogram and a bar chart?
Solve the simultaneous equations 7x - 2y = 22 and 5x + 3y = 29
What are the trigonometric functions?