Question

Answer 1

a \(3x^2+5x^2-4x^2=\left(3+5-4\right)x^2=4x^2\)

b \(5x^2y^3z^3-7x^2y^3z^3=\left(5-7\right)x^2y^3z^3=-2x^2y^3z^3\)

c \(3x^2y^2-\dfrac{1}{3}x^2y^2-\dfrac{1}{2}x^2y^2-\dfrac{1}{6}x^2y^2=\left(3-\dfrac{1}{3}-\dfrac{1}{2}-\dfrac{1}{6}+2\right)x^2y^2=4x^2y^2\)

 

Answer 2