10. 40 + 3x - x2 factorise it!!
Answers
Answered by
2
Step-by-step explanation:
-x²+3x+40
= -x² + 8x-5x +40
=-x(x-8) -5(x-8)
= -1(x-8)(x+5)
= (x+5)(8-x)
Answered by
0
Answer:
x = -5, 8
Step-by-step explanation:
-x^2+3x+40=0
x^2-3x-40=0
x^2-8x+5x-40=0
x(x-8) 5(x-8)=0
(x+5) (x-8)=0
x = -5, 8
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