Question

Use a calculator to evaluate the expression. Round your answer to two decimal places. $$4.7 b-\left(-b^{2}\right) \text { when } b=1.99$$

Short answer

The final answer to the equation is 13.31

Step-by-step solution

Substitute Value of b

The value of \( b \) given in the question is 1.99. Substitute \( b = 1.99 \) into the expression which becomes \( 4.7 \times 1.99 - (- 1.99^2) \).

Solve Pararenthesis

Solve for \( - 1.99^2 \) in the equation giving \( 4.7 \times 1.99 - (- 3.96) \). Subtraction by a negative equates to addition.

Perform Arithmetic Operations

Now perform the multiplication and addition operation, simplifying the equation to \( 9.353 + 3.96 \).

Simplify to Decimal Places

Simplify to obtain the final answer. Ensure to round off to two decimal places as instructed.