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How do I verify that (x-y)(x²+xy+y²)=x³-y³ Please I need help explaining this sum I'...

Maths work September 4, 2019 9:21 pm

How do I verify that
(x-y)(x²+xy+y²)=x³-y³

Please I need help explaining this sum I'm gonna cry i don't understand

Responses
    Platicorn0505 September 4, 2019 9:32 pm

    Since those are factors of x cubed minus y cubed, you can prove the equation by multiplying the factors back together.

    Anonymous September 4, 2019 9:37 pm

    distribution

    powhammer September 4, 2019 10:02 pm

    bruh wtf that looks like an entire different language yeah im gonna stick to basic addition and subtracting

    SimplyTrash September 4, 2019 10:07 pm

    Do you have hmm maybe instagram or something? This would be so much easier to explain through video. I don't mind teaching through video streaming :)

    tsk September 4, 2019 11:03 pm
    Since those are factors of x cubed minus y cubed, you can prove the equation by multiplying the factors back together. Platicorn0505

    no , if they r cubed then that shoud be x2+2xy+y2, also it's cubed for (x+y)^2 not for x-y
    , or that at least what i remember from math

    Kuroqui September 4, 2019 11:30 pm

    Multiply the terms x and -y by the terms x^2, xy, and y^2. Then look for the same expressions (ex; 5xy^3 and -5xy^3) and cancel it out because itself is a 0.

    Noname September 5, 2019 1:07 am

    (X-y)(x^2+xy+y^2)=x^3-y^3
    X^3+x^2y+xy^2-x^2y-xY^2-y^3=x^3-y^3
    X^3-y^3=x^3-y^3
    Distribution of the x first than the y to the x^2+xY+y^2