Question

factorise -x2+34x-240=0

Answer 1

Answer:

x = - 6, 40

Step-by-step explanation:

-x^2 + 34x -240 = 0

-x^2 + 40x - 6x - 240 = 0

-x ( x - 40 ) - 6 ( x - 40 ) = 0

( x - 40 ) ( - x - 6 ) = 0

x - 40 = 0          - x - 6 = 0

x = 40                  - x = 6

x = 40                    x = -6