Question

Please jawab no.21 sampai 25 pake cara bsk hrs dikumpul...please jawabbb

Answer 1

21. 2p + 3q = 2 | x 4
4p - q = 18 | x 2
8p + 12 q = 8
8p - 2q = 36 (dikurang)
14q = -28
q = -2

8p + 12q = 8
8p + 12(-2) = 8
8p + (-24) = 8
8p = 8 + 24
8p = 32
p = 4

maka 50 - 2q²
5(4) - 2(-2)²
20 + 8 = 28 (c)