Question

Q6 Expand the ( 5x - 3)?​

Answer 1

Step-by-step explanation:

(5x+3y)

3

Using the formula,(a+b)

3

=a

3

+b

3

+3ab(a+b)

=(5x)

3

+(3y)

3

+3×(5x)×(3y)(5x+3y)

=125x

3

+27y

3

+225x

2

y+135xy

2

Answer 2

$(5x - 3 {)}^{2} = (5x {)}^{2} + ( - 3 {)}^{2} - 2 \times 5x \times 3 \\ = 2 5{x}^{2} + 9 - 30x$