4. Verify the following for a = 3 and b = 4. a) (a + b)^2= a^2 + 2ab + b^2
b)(a + b)^2 = a^2 - 2ab + b^2
c) (a + b)(a - b) = a^2 - b^2​

answer: answer

step-by-step explanation:

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)