Question

Factorise:4x²+x-5
PLS DO IT FAST​

Answer 1

Step-by-step explanation:

Factoring 4x2+x-5

The first term is, 4x2 its coefficient is 4 .

The middle term is, +x its coefficient is 1 .

The last term, "the constant", is -5

Step-1 : Multiply the coefficient of the first term by the constant 4 • -5 = -20

Step-2 : Find two factors of -20 whose sum equals the coefficient of the middle term, which is 1 .

-20 + 1 = -19

-10 + 2 = -8

-5 + 4 = -1

-4 + 5 = 1 That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -4 and 5

4x2 - 4x + 5x - 5

Step-4 : Add up the first 2 terms, pulling out like factors :

4x • (x-1)

Add up the last 2 terms, pulling out common factors :

5 • (x-1)

Step-5 : Add up the four terms of step 4 :

(4x+5) • (x-1)

Which is the desired factorization

Answer 2

Answer:

= 4x²+(5x-4x)-5

= 4x²+5x-4x-5

= x(4x+5) - 1(4x+5)

= (4x+5)(x-1)

= 4x= -5. =x=1

= x= -5/4. =x=1

= x= -5/4 , 1 (Ans)