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Bri
Bri asked in Science & MathematicsMathematics · 1 decade ago

How do you factor this?

25m + 35n

ysquared + 4y- 21

3dsquared - 75

2 Answers

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  • ?
    Lv 7
    1 decade ago
    Favorite Answer

    a)25m + 35n =

    5(5m+7n)

    b)ysquared + 4y- 21=

    (y+7)(y-3)

    c)3dsquared - 75=

    3(dsquared - 25) =

    3(d+5)(d-5)

  • J.S.
    1 decade ago

    Factorisation

    Quadratic formula

    Different of two squares and/or completing the square

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