Question

I don't understand this,can someone explain me thus expand version
(-a+2b)^3
Thank you.

Answer 1

Take (-1) common from (-a + 2b)^3 to form
(-1)^3 × (a - 2b)^3
${( - 1)}^{3} \: \times \: {(a \: - \: 2b)}^{3}$
$( - 1) \: \times \: ({a}^{3} \: - \: 8{b}^{3} \: - \: 3 {a}^{2}b \: + \: 3a {b}^{2})$
$( -{a}^{3} \: + 8{b}^{3} \: + 3{a}^{2}b \: -3a {b}^{2})$

Answer 2

i hope this help you