Question

Does someone mind helping me with this problem? Thank you!

Answer 1

78

Explanation:

= 12 x^2 - 30 put in ' - 3 ' for 'x'

= 12 ( -3 )^2 - 30

= 12 (9) - 30 = 78

Answer 2

78

Explanation:

Expression:

• 6(2x² - 5)

Evaluate x = 3 according to the question:

`6 \{2 (- 3) {}^(2) - 5) \}`

Solve this problem, applying PEMDAS.

• 
  `6 \{2( - 3 * - 3) - 5 \}`
• 
  `6 \{2(9) - 5 \}`
• 
  `6 \{18 - 5 \}`
• 
  `6 \{13 \}`
• 
  `78`

Hence,the answer to the given expression is 78.

-Regards,Hannah :)