Question

8 Simplify: 7x² + 4x-x²​

Answer 1

`\rm{6x {}^(2) + 4x}`

Solution:

Collect like terms

`\red{7x {}^(2) } + 4x \red{ - x {}^(2) }`

`\red{6x {}^(2) } + 4x`

Answer 2

`\: \Large \mathbb{SOLUTION:}`

`\: \: \rm{ {7x}^(2) + 4x - {x}^(2)}`

`\: \: \text{Reorder and gather like terms}`

`\: \: \rm{( {7x}^(2) - {x}^(2) ) + 4x}`

`\: \: \text{Collect coeffiecients of like terms}`

`\: \: \rm{(7 - 1) {x}^(2) + 4x}`

`\: \: \text{Calculate the sum or difference}`

`\: \: \rm{ \underline{ \underline{ {6x}^(2) + 4x}}}`