Question

desarrollo de productos

Answer 1

4x + 2x = 5
6x = 5
x = 5/6

8x + 5 = 9x - 2
7 = x

4x + 9 = 8x + 9x
9 = 13x
9/13 = x

(x + 2)²
x² + 4x + 4

(- x9)²
81x²

(x + 2)(x - 2)
x² - 2x + 2x - 4
x² - 4

(x + 8)(x - 8)
x² - 8x + 8x - 64
x² - 64

(x + 3)²
x² + 6x + 9

x² + 2x - 1
a = 1, b = 2, c = - 1

x₁ = (- b + √(b² - 4ac))/2a
x₁ = (- 2 + 2√2)/2

x₂ = (- 2 - 2√2)/2
x₂ = - 1 - √2