Issolvi (2a+3)(2a-1)-(2a+1)^2

$$( 2 a + 3 ) ( 2 a - 1 ) - ( 2 a + 1 ) ^ { 2 }$$

Evalwa

$$-4$$

Passi tas-Soluzzjonijiet

Uża l-propjetà distributtiva biex timmultiplika 2a+3 b'2a-1 u kkombina termini simili.

$$4a^{2}+4a-3-\left(2a+1\right)^{2}$$

Uża teorema binomjali \left(p+q\right)^{2}=p^{2}+2pq+q^{2} biex tespandi \left(2a+1\right)^{2}.

$$4a^{2}+4a-3-\left(4a^{2}+4a+1\right)$$

Biex issib l-oppost ta' 4a^{2}+4a+1, sib l-oppost ta' kull terminu.

$$4a^{2}+4a-3-4a^{2}-4a-1$$

Ikkombina 4a^{2} u -4a^{2} biex tikseb 0.

$$4a-3-4a-1$$

Ikkombina 4a u -4a biex tikseb 0.

$$-3-1$$

Naqqas 1 minn -3 biex tikseb -4.

$$-4$$

Fattur

$$-4$$