Simplify: 6a2 + (2a2 − A2) − (A2 − B2)

Simplify:

6a² + (2a² − a²) − (a² − b²)

Sum

6a² + (2a² − a²) − (a² − b²)

= 6a²+ a²− a² + b²

= 6a² + b²

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Find the value of 6m − 2n − 5p − 3q, when m = 20, n = 10, p = 2 and q = 9

State true and false:

The value of x + 5 = 6, when x = 1

If x = 2, y = 5 and z = 4, find the value of the following:

z^x

If x = 2, y = 5 and z = 4, find the value of the following:

xy ÷ y²z

Insert the bracket as indicated:

m + n − p = − (.............)

If P = − 12x² – 10xy + 5y², Q = 7x² + 6xy + 2y², and R = 5x² + 2xy + 4y²; find P – Q + R

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Multiply and then evaluate:

(4x + y) and (x – 2y); when x = 2 and y = 1.

Multiply and then evaluate:

(x – 2y + z) and (x – 3z); when x = − 2, y = − 1 and z = 1.

Simplify:

3x – 6 {3x – 8 (5x – 10)}