Question

Clare claims that (10+3)(10-3) is equivalent to 10 32 and and (20+1)(20-1) is equivalent to 202-12 Do you agree? Show your reasoning.​

Answer 1

not equivalent (do not) because (10+3)(10-3)= 13•7=91
and
(20+1)(20-1)= 21•19= 399

Answer 2

no because paranthesis should always be done first

Explanation:

it should be (13)(7)(21)(19)