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egracer

  • one year ago

A binomial has been partially factored, as shown below: x2 − 49 = (x + 7)(_____) Which of the following binomials represents the missing factor? (x + 42) (x − 42) (x + 7) (x − 7)

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  1. campbell_st
    • one year ago
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    its the difference of 2 squares \[a^2 - b^2 = (a + b)(a - b)\]

  2. egracer
    • one year ago
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    so what would I do the figure this out... I'm a little confused on binomials

  3. jim_thompson5910
    • one year ago
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    look carefully at the formula campbell_st wrote out

  4. jim_thompson5910
    • one year ago
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    it might help to rewrite 49 as 7^2

  5. campbell_st
    • one year ago
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    well if you had \[x^2 - a^2 = (x -a)(x + ?)\]

  6. egracer
    • one year ago
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    x-7?

  7. jim_thompson5910
    • one year ago
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    correct x^2 - 49 = (x+7)(x-7)

  8. egracer
    • one year ago
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    Thank you!!

  9. jim_thompson5910
    • one year ago
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    np

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