Math

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How do i solve the following by factorization:
1) 7.7^2-2.3^2
2) 43*56+43*44

I know how to do these manually but not by factorization.

  • Math -

    these questions have been 'fudged' so that they can be done mentally by using basic factoring techniques.

    for the first
    7.7^2-2.3^2 , I see the difference of squares
    = (7.7 + 2.3)(7.7-2.3)
    = 10 (5.4)
    = 54

    the last one uses 'common factoring'
    43*56 + 43*44
    = 43(56+44)
    = 43*100
    = 4300

  • Math -

    thanks for helping.

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