Question

Which terms should Paul write in squares M1 and M2?

Answer 1

a a a a        a a a aa aaa a a aaaa

Answer 2

Answer: it's 5x and - 4x

equation is 4 x² + x -5

the factors of     -20  =  - 4 × 5

                            4 x² + 5x - 4x -5

                           x ( 4 x +5) -1 ( 4x +5)

                           (x -1) (4 x +5

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