Enrhifo
16x^{2}+39x+30
Ehangu
16x^{2}+39x+30
Graff
Rhannu
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16x^{2}+40x+25-x+5
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(-4x-5\right)^{2}.
16x^{2}+39x+25+5
Cyfuno 40x a -x i gael 39x.
16x^{2}+39x+30
Adio 25 a 5 i gael 30.
16x^{2}+40x+25-x+5
Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(-4x-5\right)^{2}.
16x^{2}+39x+25+5
Cyfuno 40x a -x i gael 39x.
16x^{2}+39x+30
Adio 25 a 5 i gael 30.
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Hafaliad cwadratig
{ x } ^ { 2 } - 4 x - 5 = 0
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