If the value of b is 7, then what is the value of the expression -3b²+25=?

Solution:

An algebraic expression is the combination of terms separated by + r - sign, comprising of other components such as coefficients, constants, and variables.

When the variable is given a value, the algebraic expression can be evaluated.

Here, value of b = 7

T evaluate -3b²+25, Substitute the value of b in the algebraic expression, we get

- 3b² + 25 = - 3 (7)² + 25

So we get

= - 3 (49) + 25

= - 147 + 25

= - 122

Therefore, the value of the expression - 3b² + 25 is - 122.

If the value of b is 7, then what is the value of the expression -3b²+25=?

Summary:

If the value of b is 7, then the value of the expression - 3b² + 25 is - 122.