Enrhifo
-\left(2y-z\right)^{2}+25x^{2}
Ehangu
25x^{2}-4y^{2}+4yz-z^{2}
Rhannu
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25x^{2}-\left(4y^{2}-4yz+z^{2}\right)
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(2y-z\right)^{2}.
25x^{2}-4y^{2}+4yz-z^{2}
I ddod o hyd i wrthwyneb 4y^{2}-4yz+z^{2}, dewch o hyd i wrthwyneb pob term.
25x^{2}-\left(4y^{2}-4yz+z^{2}\right)
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(2y-z\right)^{2}.
25x^{2}-4y^{2}+4yz-z^{2}
I ddod o hyd i wrthwyneb 4y^{2}-4yz+z^{2}, dewch o hyd i wrthwyneb pob term.
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