Question

a²+b²-2b²-3a²-a²+b²=
ayuda xfavor doy corona​

Answer 1

${a}^{2} - {b}^{2} - 3 {a}^{2} - {a}^{2} + {b}^{2} \\ - 2 {a}^{2} - {b}^{2} - {a}^{2} + {b}^{2} \\ - 3 {a}^{2} - {b}^{2} + {b}^{2} \\ - 3 {a}^{2}$