Question

Evaluate the expression for the given value of the variable 3a^2 + 4b; a= -6, b= -5

Answer 1

3a^2+ 4b; a = -6, b = -5

• Substitute the given values of a and b into the expression.

3(-6)^2 + 4(-5)

• Solve exponents first.

3(36) + 4(-5)

• Multiply.

108 + -20

• Solve.

88 is your answer.

Answer 2

To evaluate the expression 3a^2 + 4b for a= -6 and b= -5, substitute the values, perform the operations according to BODMAS rule, and sum up the resulted numbers to get 88.

Step-by-step explanation:

To evaluate the expression 3a^2 + 4b for a= -6 and b= -5, we first substitute these values into the equation. We get 3(-6)^2 + 4(-5).

Then, we perform the exponent operation first, according to the BODMAS rule of sequence of operations in maths (Brackets, Orders that is square roots and powers/exponents, Division and Multiplication, and Addition and Subtraction). We get 3*36 + 4*-5.

Next, we carry out the multiplication operation. Consequently, we have 108 + -20.

Finally, we sum up these two numbers to get the final answer, resulting in 88.

Learn more about Evaluating Expressions