Question

factorise 7x-6x^2+20​

Answer 1

Answer:

6x^2 + 7x - 20

6x^2 + (15 - 8)x - 20

6x^2 + 15x - 8x - 20

3x (2x + 5) - 4 (2x + 5)

(2x+5) (3x-4)

Now,

2x = -5

x = -5/2

And,

3x = 4

x = 4/3

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Answer 2

Answer:x=5/2,-4/3

Step-by-step explanation:7x-6x^2+20=0

-6x^2+7x+20=0

Multiple with - then we get,

-(6x^2+7x+20)=0

6x^2-7x-20=0

6x^2-15x+8x-20=0

3x (2x-5)+4 (2x-5)=0

(2x-5) or (3x+4)=0

2x -5=0,3x +4=0

2x =5,3x =-4

x=5/2,x=-4/3