Math Problem Statement

Evaluate the expression x^2 - 3y + 12 for x = -2 and y = 5.

Solution

The expression shown in the image is:

x23y+12forx=2andy=5x^2 - 3y + 12 \quad \text{for} \quad x = -2 \quad \text{and} \quad y = 5

Let's evaluate this step by step:

  1. Substitute x=2x = -2 and y=5y = 5 into the expression:

(2)23(5)+12(-2)^2 - 3(5) + 12

  1. Simplify each term:
  • (2)2=4(-2)^2 = 4
  • 3(5)=153(5) = 15

Now the expression becomes:

415+124 - 15 + 12

  1. Combine the terms:

415=114 - 15 = -11 11+12=1-11 + 12 = 1

Therefore, the value of the expression is 1.

Would you like further details or have any other questions?

Here are 5 related questions for practice:

  1. Evaluate x24y+15x^2 - 4y + 15 for x=3x = -3 and y=2y = 2.
  2. Calculate x3+y210x^3 + y^2 - 10 for x=1x = 1 and y=4y = 4.
  3. Simplify 2x25y+202x^2 - 5y + 20 for x=0x = 0 and y=3y = -3.
  4. Find the value of x26y+18x^2 - 6y + 18 when x=2x = 2 and y=3y = 3.
  5. Evaluate 5x+y275x + y^2 - 7 for x=3x = 3 and y=1y = 1.

Tip: Always apply the order of operations (PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction) when evaluating expressions!

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Math Problem Analysis

Mathematical Concepts

Substitution
Algebra
Simplifying Expressions

Formulas

x^2 - 3y + 12

Theorems

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Suitable Grade Level

Grades 6-8