Question

(За – 1)2 - 6а + 2 factrorise​

Answer 1

0 = (3a-1)² -6a + 2

0 = 9a² + 1 - 6a - 6a + 2

0 = 9a² - 12a + 3

0 = 9a² - 9a - 3a + 3

0 = 9a(a-1) -3 (a -1)

0 = (9a-3) (a-1)

If the product of two terms is 0 then either first term is 0 or second term is 0.

First term

9a - 3 = 0

a = 3/9

a = 1/3

Second term,

a - 1 = 0

a = 1

Therefore,

a = 1/3 or 1.

Answer 2

Answer:

a=1/3,a=1

Step-by-step explanation:

=9a² +1-6a-6a+2

=9a² -12a+3

=9a² -9a-3a+3

=9a(a-1)-3(a-1)

=(9a-3), (a-1)

=9a=3, a=1

=a=3/9,a=1

=a=1/3,a=1