Question

simplify (15+6)^2-(8-5)^2

Answer 1

Use "PEMDAS" (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction) to know what to do first.

(15 + 6)^{2} - (8 - 5)^{2}   Solve the insides of the parentheses
21^{2} - 3^{2}                   Solve the exponents (21 x 21) and (3 x 3)
441 - 9                             Subtract
432

Answer 2

$\huge\text{Hey there!}$

$\huge\boxed{\mathsf{(15 + 6)^2 - (8 - 5)^2}}\\\huge\boxed{\rightarrow\mathsf{ 21^2 - 3^2}}\\\\\\\huge\boxed{21\times21}\\\huge\boxed{= \bf 441}\\\\\huge\boxed{3\times3}\\\huge\boxed{= \bf \underline{\underline{9}}}\\\\\\\huge\boxed{\bold{441} - \underline{\underline{\bf 9}}}\\\huge\boxed{\boxed{= \bf \underline{4}32}}\\\\\\\\\huge\boxed{\textsf{Therefore, your answer is: 432}}\huge\checkmark\\\\\\\\\\\\\huge\text{Good luck on your assignment \& enjoy your day!}\\\\\\\frak{Amphitrite1040:)}$