Enrhifo
-\left(x+2.5\right)^{2}-1
Ehangu
-x^{2}-5x-7.25
Graff
Rhannu
Copïo i clipfwrdd
-\left(x^{2}+5x+6.25\right)-1
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(x+2.5\right)^{2}.
-x^{2}-5x-6.25-1
I ddod o hyd i wrthwyneb x^{2}+5x+6.25, dewch o hyd i wrthwyneb pob term.
-x^{2}-5x-7.25
Tynnu 1 o -6.25 i gael -7.25.
-\left(x^{2}+5x+6.25\right)-1
Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(x+2.5\right)^{2}.
-x^{2}-5x-6.25-1
I ddod o hyd i wrthwyneb x^{2}+5x+6.25, dewch o hyd i wrthwyneb pob term.
-x^{2}-5x-7.25
Tynnu 1 o -6.25 i gael -7.25.
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