1-takrorlash: sonlar, ifodalar va tenglamalar
Avval o‘zingiz yeching, keyin javobni tekshiring.
1
48 va 180 sonlarining EKUB va EKUKini toping.
48 = 2^4·3, 180 = 2^2·3^2·5. EKUB = 12, EKUK = 2^4·3^2·5 = 720
2
Maosh 20% ga, keyin yana 10% ga oshdi. Jami necha foizga oshdi?
1,2 · 1,1 = 1,32, ya’ni 32% ga
3
(3x + 2)^2 − (3x − 2)^2 ni soddalashtiring.
24x
4
sqrt(2x + 8) = x tenglamani yeching.
2x + 8 = x^2, x^2 − 2x − 8 = 0, x = 4 yoki x = −2. x = −2 begona. Javob x = 4
5
x^2 + y^2 = 34, x + y = 8 sistemani yeching.
xy = (64 − 34) / 2 = 15, (3; 5) va (5; 3)