Splitting the middle tearm :
40+3x-x^2
Answers
Answered by
1
Answer:
-x^2+3x+40=0
-x^2+8x-5x+40=0
-x(x-8)-5(x-8)=0
(x-8)(-x-5)=0
x=8 or -5
Answered by
1
Answer:
3x = 8x - 5x , x = 8 , x = -5
Step-by-step explanation:
P(x) = 40 + 3x - x²
⇒ 40 + 3x - x² = 0
⇒ 40 + 8x - 5x - x² = 0
⇒ 8( 5 + x ) - x( 5 + x ) = 0
⇒ ( 8 - x )( 5 + x ) = 0
⇒ x = 8 , x = -5
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