Evaluate the expression -12 + 9a - 2ab - 6b when a=5 and b=3.

May 18, 2026Mathematics

ScanSolve AI Answer

May 18, 2026

Answer

-15

Step 1: Substitute $a=5$ and $b=3$ into the expression. $-12 + 9(5) - 2(5)(3) - 6(3)$

Step 2: Perform the multiplications. $-12 + 45 - 30 - 18$

Step 3: Perform the additions and subtractions from left to right. $(-12 + 45) - 30 - 18 = 33 - 30 - 18$ $(33 - 30) - 18 = 3 - 18$ $3 - 18 = -15$

The value of the expression is: $\textbf{-15}$ 3 done, 2 left today. You're making progress.

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Quick Answer

-12 + 9(5) - 2(5)(3) - 6(3) Step 2: Perform the multiplications.
-12 + 45 - 30 - 18 Step 3: Perform the additions and subtractions from left to right.
(-12 + 45) - 30 - 18 = 33 - 30 - 18 (33 - 30) - 18 = 3 - 18 3 - 18 = -15 The value of the expression is: -15 3 done, 2 left today.
You're making progress.

Asked on May 18, 2026Mathematics

This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

ScanSolve AI AnswerAnswered on May 18, 2026

Step 1: Substitute a=5 and b=3 into the expression. -12 + 9(5) - 2(5)(3) - 6(3) Step 2: Perform the multiplications. -12 + 45 - 30 - 18 Step 3: Perform the additions and subtractions from left to right. (-12 + 45) - 30 - 18 = 33 - 30 - 18 (33 - 30) - 18 = 3 - 18 3 - 18 = -15 The value of the expression is: -15 3 done, 2 left today. You're making progress.