Побудуйте графік функції y=x^2-4x-5 1)користуючись графіком знайдіть значення функції 2) проміжок, на якому функція зростає

(x^2 + x + 4)^2 + 8x(x^2 + x + 4) = - 15x^2
(x^2 + x + 4)(x^2 + x + 4 + 8x) = - 15x^2
(x^2 + x +4)(x^2 +9x + 4) = - 15x^2
x^4 + 9x^3 + 4x^2 + x^3 + 9x^2 + 4x + 4x^2 + 36x + 16 + 15x^2 = 0
x^4 + 10x^3 + 32x^2 + 40x + 16 =0
( x+ 2)^2(x^2 + 6x + 4) = 0
(x + 2)(x + 2)(x^2 + 6x + 4) = 0
x + 2 = 0
x = - 2
x  + 2 = 0
x = - 2
x^2 + 6x + 4 = 0
D = b^2 - 4ac =36 - 16 = 20
x1 = ( - 6 + 2√5) / 2 = - 2(3 - √5) / 2 = - (3 - √5) = √5 - 3
x2 = ( - 6 - 2√5) / = - 2(3 + √5)/ 2 = - (3 + √5) = - 3 - √5
ответ: x1 = √5 - 3,x2 = -√5 - 3, x3 = - 2,x4 = - 2

Постав лутшу відповідь
Simplifying x = 3x + -1(-9x + -1(7x + -15) + 3) + -9 Reorder the terms: x = 3x + -1(-9x + -1(-15 + 7x) + 3) + -9 x = 3x + -1(-9x + (-15 * -1 + 7x * -1) + 3) + -9 x = 3x + -1(-9x + (15 + -7x) + 3) + -9 Reorder the terms: x = 3x + -1(15 + 3 + -9x + -7x) + -9 Combine like terms: 15 + 3 = 18 x = 3x + -1(18 + -9x + -7x) + -9 Combine like terms: -9x + -7x = -16x x = 3x + -1(18 + -16x) + -9 x = 3x + (18 * -1 + -16x * -1) + -9 x = 3x + (-18 + 16x) + -9 Reorder the terms: x = -18 + -9 + 3x + 16x Combine like terms: -18 + -9 = -27 x = -27 + 3x + 16x Combine like terms: 3x + 16x = 19x x = -27 + 19x Solving x = -27 + 19x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-19x' to each side of the equation. x + -19x = -27 + 19x + -19x Combine like terms: x + -19x = -18x -18x = -27 + 19x + -19x Combine like terms: 19x + -19x = 0 -18x = -27 + 0 -18x = -27 Divide each side by '-18'. x = 1.5 Simplifying x = 1.5