tlg no 6 tq kl bs pke cara tq

(5x -2)^2 + (6x)^2 = (7x+2)^2
25x^2 - 20x +36x^2 = 49x^2 +28x+4
12x^2 = 28+20
x^2 = 48÷12 = 4
x = √4 = 2

PR = 16cm
RS = 8cm
QR = 12cm
Luas = 8×12 = 96cm^2
Kll = 2(8+12) = 40cm