Question

(3 -a)2 ; (-5 +2k)2 ?

Answer 1

(3-а)2=6-2а
(-5+2k)2= -10+4k

Answer 2

9-6а+а^2
25-(-20)+4k^2

Answer 3

To simplify the expressions (3 - a)^2 and (-5 + 2k)^2, we need to expand them using the formula for squaring a binomial:

For any binomial (x + y)^2, the expansion is given by: (x + y)^2 = x^2 + 2xy + y^2.

1. Simplifying (3 - a)^2:

(3 - a)^2 = (3)^2 + 2(3)(-a) + (-a)^2 = 9 - 6a + a^2

2. Simplifying (-5 + 2k)^2:

(-5 + 2k)^2 = (-5)^2 + 2(-5)(2k) + (2k)^2 = 25 - 20k + 4k^2

So, the simplified expressions are:

1. (3 - a)^2 = 9 - 6a + a^2
2. (-5 + 2k)^2 = 25 - 20k + 4k^2