Question

Answer 1

a)\(\left(\dfrac{a}{3}+4y\right)^2\)=\(\dfrac{a^2}{9}+\dfrac{8a}{3}+16y^2\)

 

Answer 2

b)\(\left(\dfrac{1}{x}-\dfrac{3}{y}\right)^2\)=\(\dfrac{1}{x^2}-\dfrac{6}{xy}+\dfrac{9}{y^2}\)

Answer 3

c)\(\left(\dfrac{x}{2}-\dfrac{yz}{6}\right)\left(\dfrac{x}{2}+\dfrac{yz}{6}\right)\)=\(\dfrac{x^2}{4}-\dfrac{\left(yz\right)^2}{36}\)

Answer 4

d)\(\left(x^2+\dfrac{2}{5}y\right)\left(x^2-\dfrac{2}{5}y\right)\)=x⁴-\(\dfrac{4}{10}y^2\)

Answer 5

e)(y-2xy)²=y²-4xy²+4x²y²

Answer 6

i)(a+b+c)²=a²+b²+c²+2ab+2bc+2ac

Answer 7

j)(a-b-c)²=a²+b²+c²-2ab+2bc-2ac

Answer 8

k)(a-c+b)²=a²+b²+c²+2ab-2bc-2ac