Respuesta:
2x² - 32 = 0, x = 4
12x² - 12 = 0, x = 1
9x² - 81 = 0, x = 3
10x² + 25x, x = - 2,5
4x² - 16x = 0, x = 4
7x² - 28x = 0, x = 4
Explicación paso a paso:
2x² - 32 = 0
2x² = 32
x² = 32 / 2
x² = 16 = 4²
x = 4
12x² - 12 = 0
12x² = 12
x² = 12 / 12
x² = 1 = 1²
x = 1
9x² - 81 = 0
9x² = 81
x² = 81 / 9
x² = 9 = 3²
x = 3
10x² + 25x = 0
5x ( 2x + 5 ) = 0
2x + 5 = 0 / 5x
2x + 5 = 0
2x = - 5
x = - 5 / 2
x = - 2,5
4x² - 16x = 0
4x ( 4x - 4 ) = 0
4x - 4 = 0 / 4x
4x - 4 = 0
4x = 4
x = 4 / 4
7x² - 28x = 0
7x ( x - 4 ) = 0
x - 4 = 0 / 7x
x - 4 = 0
