Which shows one way to determine the factors of 12x3 – 2x2 + 18x – 3 by grouping?

we are given

Firstly, we will split terms

We can group first two and last two terms

we can see that 2x^2 is common in first two terms

and 3 is common in last two terms

so, we can factor factor out 2x^2 from first group and 3 from second group

we get

we can see that each terms are multiple of 6x-1

so, we can factor out 6x-1

so, we get

............Answer

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .