How to evaluate an algebraic expression, x^2 + yx - (3y + x) + 2; x = -2 and y = 3

The video tutorial explains how to plug values into equations, emphasizing the importance of using parentheses to avoid errors. It covers the order of operations, particularly when dealing with negative numbers and squaring them. The tutorial provides examples to illustrate these concepts, ensuring students understand the correct process for evaluating expressions. The final example demonstrates a complete calculation, reinforcing the importance of following mathematical rules to arrive at the correct answer.

What is the correct value to substitute for X in the equation?

• 0

• 3

• -2

• 5

Why are parentheses crucial when substituting values in equations?

• They help in avoiding calculation errors.

• They make the equation look neat.

• They are used to separate terms.

• They are not necessary.

What is the result of squaring -2 without using parentheses?

• -2

• 0

• 4

• -4

What is the final result of the equation after evaluating all operations?

• -7

• 7

• 0

• -2

What operation is performed first according to the order of operations?

• Subtraction

• Squaring

• Addition

• Multiplication