Factorise using appropriate identity: 4x^2 - 12x + 9

1.	Factorise using appropriate identity: 4x^2 - 12x + 9
Answer» Explanation: USE the rainbow method. Multiply the TWO outer coefficients. 4 ⋅ 9 = 36 Find two NUMBERS, that when multiplied equal 36, and when added equal -12. -6 and -6. − 6 + − 6 = 12 − 6 ⋅ − 6 = 36 Rewrite the equation with the x VALUE replaced by the two new VALUES. 4 x 2 − 6 x − 6 x + 9 Seperate the equation into two parts. 4 x 2 − 6 x and − 6 x + 9 Find the GCF of the two parts. 2 x ( 2 x − 3 ) and − 3 ( 2 x − 3 ) Take the GCF as your first factor, and the two remaining values as the second. 2x-3 and 2x-3 hope it helps please follow me

Answer»

Explanation:

USE the rainbow method.

Multiply the TWO outer coefficients.

⋅

Find two NUMBERS, that when multiplied equal 36, and when added equal -12.

-6 and -6.

−

⋅

−

Rewrite the equation with the x VALUE replaced by the two new VALUES.

−

Seperate the equation into two parts.

−

and

−

Find the GCF of the two parts.

(

−

)

and

−

(

−

)

Take the GCF as your first factor, and the two remaining values as the second.

2x-3 and 2x-3

hope it helps

please follow me

Discussion