Simplify: (a + b)².
a² + 2ab + b².
a² + (ab)² + b².
2a + 2ab + 2b.
The number of terms in the expression 2ax + 3by - 1 are:
4.
3.
2.
7.
Simplify: 20ab -30pb.
Simplify: 8axy +2xy.
Given that x = −4, y = 9 the value of y - x² is:
-7.
17.
13.
