因式分解 (1)0.48x^2-5x-13

解答

因式分解

(1) 0.48 x^{2} - 5 x - 13

0.48 (x - 12.57108 \dots) (x + 2.15441 \dots)

求解步骤

(1) \cdot 0.48 x^{2} - 5 x - 13

改写为

= (1) \cdot 0.48 (x^{2} - 10.41666 \dots x - 27.08333 \dots)

因式分解

x^{2} - 10.41666 \dots x - 27.08333 \dots : (x + 2.15441 \dots) (x - 12.57108 \dots)

(1) \cdot 0.48 (x + 2.15441 \dots) (x - 12.57108 \dots)

整理后得

= 0.48 (x - 12.57108 \dots) (x + 2.15441 \dots)

f a c t or 5 \times 2

f a c t or (x + h) (x + h) (x + h)

f a c t or 3 x + (- 1)

f a c t or g (4 x)

f a c t or (9 n - \frac{4}{7} z)^{2}