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musickatia [10]
3 years ago
7

Ms. J has been practicing her factoring skills. She factored the following problem by grouping,

Mathematics
1 answer:
nadya68 [22]3 years ago
8 0

Answer:

a) She did mistake in Step 2

b) when she take -3y common then the term should be: -3y(x+5) instead she wrote -3y(x-5)

Step-by-step explanation:

We need to find problem in Ms J solution.

Ms J solution:

Step \ 1: 4x^2 + 20x - 3xy - 15y\\Step \ 2: 4x(x + 5) - 3y(x - 5)\\Step \ 3: (x+5)(4x - 3y)

She did mistake in Step 2 when she take -3y common then the term should be: -3y(x+5) instead she wrote -3y(x-5)

Correcting the mistake:

Step \ 1: 4x^2 + 20x - 3xy - 15y\\Step \ 2: 4x(x + 5)\mathbf{- 3y(x +5)}\\Step \ 3: (x+5)(4x - 3y)

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