Enrhifo
5-10y
Ehangu
5-10y
Graff
Rhannu
Copïo i clipfwrdd
y^{2}-6y+9-\left(y+2\right)^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(y-3\right)^{2}.
y^{2}-6y+9-\left(y^{2}+4y+4\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(y+2\right)^{2}.
y^{2}-6y+9-y^{2}-4y-4
I ddod o hyd i wrthwyneb y^{2}+4y+4, dewch o hyd i wrthwyneb pob term.
-6y+9-4y-4
Cyfuno y^{2} a -y^{2} i gael 0.
-10y+9-4
Cyfuno -6y a -4y i gael -10y.
-10y+5
Tynnu 4 o 9 i gael 5.
y^{2}-6y+9-\left(y+2\right)^{2}
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(y-3\right)^{2}.
y^{2}-6y+9-\left(y^{2}+4y+4\right)
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(y+2\right)^{2}.
y^{2}-6y+9-y^{2}-4y-4
I ddod o hyd i wrthwyneb y^{2}+4y+4, dewch o hyd i wrthwyneb pob term.
-6y+9-4y-4
Cyfuno y^{2} a -y^{2} i gael 0.
-10y+9-4
Cyfuno -6y a -4y i gael -10y.
-10y+5
Tynnu 4 o 9 i gael 5.
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\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
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\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}