(5v - 3)(3v - 2)
Factoring by grouping is factoring by splitting an expression into two pairs of terms and factoring separately. This is generally used when you have four terms and nothing to factor out of all of them.
(x - 2)(9y - 2)
(s + 6)(6s - 7)
xy(x^2 + 2x + y^2)
landsteiner n wiener discovered rh factor in 1940..........
Common factors are always odd numbers
By grouping. Sometimes group 3 terms and factor them as trimonial them see if you can do more with the last term. sometimes you group them into pairs and factor the pairs, then see if you can do more.
(x2 plus 40) (x minus 1)
(a + b)(r + s)
If there are 4 or more terms in a problem, and none are like terms.
3 - 3x + x2 - x3 = (1 - x)(x2 + 3)