a)
MSC: \(60x^4y^5\)
\(\dfrac{4}{15x^3y^5}=\dfrac{4.4.x}{15.4.x^3.x.y^5}=\dfrac{16x}{60x^4y^5}\)
\(\dfrac{11}{12x^4y^2}=\dfrac{11.5.y^3}{12.5.x^4.y^2.y^3}=\dfrac{55y^3}{60x^4y^5}\)
b)
MSC: \(4x^2-16\)
\(\dfrac{x}{2x-4}=\dfrac{2\left(2x+4\right)}{4x^2-16}=\dfrac{4x+8}{4x^2-16}\\ \dfrac{1}{2x+4}=\dfrac{2x-4}{4x^2-16}\)
c)
MSC: \(6x+6y\)
\(\dfrac{1}{3x+3y}=\dfrac{2}{6x+6y}\\ \dfrac{1}{2y+2x}=\dfrac{3}{6x+6y}\)
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