The value of the expression x² - y when x = 3 and y = 2 is:
7.
1.
11.
4.
Given that ab² = xy, then b expressed in terms of a, x and y is:
√(xy-a).
√(xy/a).
√(a-xy).
√(a/xy).
The value of x in the equation 22x = 8 is:
2.
3/2.
2/3.
The coefficient of t in the expression 3x2 + t − 5 is:
-5.
3.
Simplify: (a + b)².
2a + 2ab + 2b.
a² + 2ab + b².
a² + (ab)² + b².
