Question

Calcule:

a) (+2x)²
b) (-3a²)³
c) (+2x²y)³
d) (-xy²)^4
e) -(1/2a)²

Answer 1

a )

$(2x)^2~\to~4x^2$

b )

$(-3a^2)^3~\to~(-3)^3*(a^2)^3~\to~-27a^6$

c )

$(2x^2y)^3~\to~(2x^2)^3*y^3~\to~8x^6y^3$

d )

$(-xy^2)^4~\to~(-x)^4*(y^2)^4~\to~x^4y^8$

e  )

$-( \frac{1}{2}a )^2~\to~- \frac{1}{4}a^2$