1) Tim x
a) (2x-3)² 4x(x+5) = 10
97
b₂ (5x+1)² - (5x-3)² = 20
↳ (4x-3)² - 4x (2x-1) (2x-3)=-25.
27 win ghi on lethed
37
cal
10x - 25 fai x = 105
A = x²+10x-25
B = 4x² - 12x + 52 fai x=51,5
C = 25x² - 20x - 28 tai x=
Teim Min (Max) wa
A = x² - 10x +30
x = 12
D= 6x-x²++
2
E=8x-4x²-15
B = 9x2
1
18x +34
2
C = Ax² + 20x -20 F = x²-6xy + 104 - 44 +20
2
G= 5x² + 4xy + y²+6x-10
