Solve 3-1/2(7)^2

$$3 - \frac { 1 } { 2 } ( 7 ) ^ { 2 }$$

Evaluate

$$-\frac{43}{2}=-21.5$$

Solution Steps

Calculate 7 to the power of 2 and get 49.

$$3-\frac{1}{2}\times 49$$

Multiply \frac{1}{2} and 49 to get \frac{49}{2}.

$$3-\frac{49}{2}$$

Convert 3 to fraction \frac{6}{2}.

$$\frac{6}{2}-\frac{49}{2}$$

Since \frac{6}{2} and \frac{49}{2} have the same denominator, subtract them by subtracting their numerators.

$$\frac{6-49}{2}$$

Subtract 49 from 6 to get -43.

$$-\frac{43}{2}$$

Factor

$$-\frac{43}{2} = -21\frac{1}{2} = -21.5$$