Petra is practicing factoring by grouping. She wants to factor the polynomial 16xy−4x^2+28y−7x. Her work is shown below.
16xy−4x^2+28y−7x
4x(4y−x)+7(4y−x)
(4x+7)(4y−x)
Which statements regarding Petra’s work are true?
There may be more than one correct answer. Select all correct answers.
1. The constant 7 is not the greatest common factor of 28y−7x.
2. Petra is correct.
3. The product of Petra’s factors is not the original polynomial.
4. The monomial 4x is not the greatest common factor of 16xy−4x^2.
5. Petra is incorrect.
6. The product of Petra’s factors is the original polynomial.
could somebody help
2 answers
She is correct!
yes, but you need to choose 2,6 as instructed