Question

Evaluate the expression when m= 2. m2 - 8m -3​

Answer 1

`\boxed{ \bold{ \huge{ \boxed{ \sf{ - 15 }}}}}`

Explanation:

Given, m = 2

`\sf{ {m}^(2) - 8m - 3}`

plug the value of m

`\longrightarrow{ \sf{ {2}^(2) - 8 * 2 - 3}}`

Evaluate the power : 2²

`\longrightarrow{ \sf{4 - 8 * 2 - 3}}`

Multiply the numbers: 8 and 2

`\longrightarrow{ \sf{4 - 16 - 3}}`

The positive and negative integers are always subtracted but posses the sign of the bigger integer :

`\longrightarrow{ \sf{ - 12 - 3}}`

The negative integers are always added but posses the negative ( - ) sign

`\longrightarrow{ \sf{ - 15}}`

Hope I helped!

Best regards! :D

Answer 2

-15

Explanation:

When

• m=2

Expression get value of:

• m² - 8n - 3 =
• 2² - 8*2 - 3 =
• 4 - 16 - 3 =
• -15