Show that 279 can be expressed as the sum of a power of 3

and a square number.

279 = 3^5 + 6^2

Step-by-step explanation:

The highest power of 3 that 279 can be expressed is 5

3 raise to the power of 5 is 243

The difference between 279 and 243 is 36

The square root of 36 is 6

Therefore, 279 is the sum of 3 raise to the power of 5 and the square of 6.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)