1) 4(x^2 + 1) - 7x^2 = 04x^2 + 4 - 7x^2 = 0-3x^2 + 4 = 0-3x^2 = -4x^2 = 4/3x = ± √(4/3)x = ± 2/√3x = ± 2√3 / 3
2) 4(x^2 + x) = -3x4x^2 + 4x = -3x4x^2 + 4x + 3x = 04x^2 + 7x = 0x(4x + 7) = 0x = 0 or x = -7/4
1) 4(x^2 + 1) - 7x^2 = 0
4x^2 + 4 - 7x^2 = 0
-3x^2 + 4 = 0
-3x^2 = -4
x^2 = 4/3
x = ± √(4/3)
x = ± 2/√3
x = ± 2√3 / 3
2) 4(x^2 + x) = -3x
4x^2 + 4x = -3x
4x^2 + 4x + 3x = 0
4x^2 + 7x = 0
x(4x + 7) = 0
x = 0 or x = -7/4