Question

(0.8x-0.5y)(1.5x-3y)​

Answer 1

Step-by-step explanation:

Suppose (a−b) and (c−d) are two binomials. By using the distributive law of multiplication over subtraction twice, we may find their product as given below.

(a−b)×(c−d)=a×(c−d)−b×(c−d)=(a×c−a×d)−(b×c−b×d)

=ac−ad−bc+bd

∴(0.8x−0.5y)(1.5x−3y)

=0.8x×(1.5x−3y)−0.5y×(1.5x−3y)

=[(0.8x×1.5x)−(0.8x×3y)]−[(0.5y×1.5x)−(0.5y×3y)]

=(1.2x

2

−2.4xy−0.75yx+1.5y

2

)

=(1.2x

2

−3.15xy+1.5y

2

)

Answer 2

Answer:

Step-by-step explanation:

(1.5*0.8)x^2-(1.5)(0.5)xy-3(0.8)xy+3(0.5)y^2

=1.2x^2-0.75xy-2.4xy+1.5y^2

=1.2x^2+1.5y^2-3.15xy