Question

Simplify -5(3m2 + 7n2) + 8n2

Answer 1

-15m² - 27n²

Explanation:

-5(3m² + 7n²) + 8n²

Expand brackets.

-15m² + -35n² + 8n²

Combine like terms.

-15m² + -27n²

Answer 2

`\boxed{\red{= - 3(5 {m}^(2) + 9 {n}^(2) )}}`

Explanation:

`- 5(3 {m}^(2) + 7 {n}^(2) ) + 8 {n}^(2) \\ - 15 {m}^(2) - 35 {n}^(2) + 8 {n}^(2) \\ = - 15 {m}^(2) - 27 {n}^(2) \\ = - 3(5 {m}^(2) + 9 {n}^(2) )`