Question

Doy corona, ayuda plis no entiendo :/​

Answer 1

1. x^2 + 10x + 16

$x= \frac{-10+-\sqrt{10^2 - 4*16} }{2}$

$x = \frac{-10+-6 }{2}$

$x_{1} = \frac{-10-6}{2}\\x_{1} = -8$

$x_2 = \frac{-10+6}{2}\\x_2 = -2$

2. x^2 - 3x - 10

$x=\frac{3+-\sqrt{(-3)^2 - 4*(-10)} }{2}\\x = \frac{3+- \sqrt{9+40} }{2}\\x = \frac{3+-7}{2}$

$x_1 = \frac{3-7}{2}\\x_1 = -2\\x_2 = \frac{3+7}{2}\\x_2 = 5$

3. x^2 + 18x + 81

$x = \frac{-18+-\sqrt{18^2 - 4 * 81} }{2}\\x = \frac{-18+-\sqrt{0} }{2}\\x = \frac{-18}{2}\\x = -9$

4. x^2+2xv + v^2

$x^2 +2xv + v^2 \\x(x+2v+v^2) = 0$

5. x^2 - 196 = 0

$x^2 = 196\\\sqrt{x^2} = \sqrt{196}\\x = 14$

6. 9x^2 - 36y^2

$9x^2 - 36y^2 = 0\\\\9x^2 = 36y^2\\\\\sqrt{9x^2} = \sqrt{36y^2} \\3x = 6y\\x = 2y$

Espero que te ayude.