Enrhifo
-\left(x+2y\right)\left(7x+2y\right)
Ehangu
-7x^{2}-16xy-4y^{2}
Rhannu
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9x^{2}-4\left(y^{2}+4yx+4x^{2}\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(y+2x\right)^{2}.
9x^{2}-4y^{2}-16yx-16x^{2}
Defnyddio’r briodwedd ddosbarthu i luosi -4 â y^{2}+4yx+4x^{2}.
-7x^{2}-4y^{2}-16yx
Cyfuno 9x^{2} a -16x^{2} i gael -7x^{2}.
9x^{2}-4\left(y^{2}+4yx+4x^{2}\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(y+2x\right)^{2}.
9x^{2}-4y^{2}-16yx-16x^{2}
Defnyddio’r briodwedd ddosbarthu i luosi -4 â y^{2}+4yx+4x^{2}.
-7x^{2}-4y^{2}-16yx
Cyfuno 9x^{2} a -16x^{2} i gael -7x^{2}.
Enghreifftiau
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