Question

pleasee Helpppp

copy and complete this sequence of calculations(^2 means squared -
a) 3^2 - 1^2 = 4^2 - 2^2 =
5^2 - 3^2 = 6^2 - 4^2 =

B) describe the sequence of answers to the calculations

C) describe a rule to find the answer without squaring the numbers.

D) use the rule to find the answer to 15 squared - 13 squared

Answer 1

square each first, then subtract second

Answer 2

for example the last one is \(6^2 - 4^2 \) so first compute \(6\times 6=36\) and \(4\times 4=16\) and then compute
\[36-16=20\]

Answer 3

i think that you are also supposed to notice that each
\[a^2-b^2\] is the same as \[(a+b)(a-b)\] for example
\[6^2-4^2=36-16=20=(6+4)(6-4)=10\times 2\]

Answer 4

I've done the first bit but i need b c and d /: xxx