Issolvi 2a+6b-3left(a+3bright)^2

$$2a+6b-3 { \left(a+3b \right) }^{ 2 }$$

Evalwa

$$-3\left(a+3b\right)^{2}+2a+6b$$

Passi tas-Soluzzjonijiet

Uża teorema binomjali \left(p+q\right)^{2}=p^{2}+2pq+q^{2} biex tespandi \left(a+3b\right)^{2}.

$$2a+6b-3\left(a^{2}+6ab+9b^{2}\right)$$

Uża l-propjetà distributtiva biex timmultiplika -3 b'a^{2}+6ab+9b^{2}.

$$2a+6b-3a^{2}-18ab-27b^{2}$$

Espandi

$$6b-27b^{2}+2a-18ab-3a^{2}$$

Passi tas-Soluzzjonijiet

Uża teorema binomjali \left(p+q\right)^{2}=p^{2}+2pq+q^{2} biex tespandi \left(a+3b\right)^{2}.

$$2a+6b-3\left(a^{2}+6ab+9b^{2}\right)$$

Uża l-propjetà distributtiva biex timmultiplika -3 b'a^{2}+6ab+9b^{2}.

$$2a+6b-3a^{2}-18ab-27b^{2}$$