Question

if x=44 then (x-7)(x+7)=?

Answer 1

Answer:

substitute X=44 in the equation

then (44-7)(44+7)

by applying a+b×a-b formula we get a²-b²

I.e 44²-7²

1936-49. (44²=1936 and 7²=49)

1887

therefore the answer is 1887