Wykonaj działanie stosując wzory skróconego mnożenia. (a+b)^2= a^2+2ab+b^2 (a-b)^2= a^2-2ab+b^2 (a+b)(a-b)=a^2-b^2   1. 4(pq-2)^2+3(pq+5)^2=   2. 2(3a+1)(a+5)+4(2a+3)(3a+5)=   3. 2(3t+5)2t-2)^2-5(3t+7t-9)-(t+6)^2=

1. 4(pq-2)^2+3(pq+5)^2=    = 4(p²q² - 4pq + 4) + 3(p²q² +10pq +25) =    = 4p²q² -16pq + 16 + 3p²q² +30pq+75=    = 7p²q²+14pq + 91   2. 2(3a+1)(a+5)+4(2a+3)(3a+5)=    = 2(3a²+15a+a+5) + 4(6a²+10a+9a+15)=    = 6a²+30a+2a+10 +24a²+40a+36a+60=    = 30a²+108a +70   3. 2(3t+5)2t-2)^2-5(3t+7t-9)-(t+6)^2=   =  2(3t+5)(4t²-8t+4) - 15t - 35t+45 -(t²+12t+36) =   =  2(12t³ - 24t²+12t + 20t²-40t+20) -50t+45 - t² -12t-36 =  =  24t³ -48t²+24t+40t² -80t+40  - 62t -t²+9=   = 24t³ -9t²-118t +49