Question

tentukan operasi hitung dari

a. f(x) = (2x-5) (4x+1)

b. f(x) = 2x+2/5x-7

c. f(x) = 7x^2-10x+6x^2

Answer 1

Penjelasan dengan langkah-langkah:

a) Misalnya, jika kita menentukan x = 3, maka f(x) = (2x - 5) (4x + 1) = (2 * 3 - 5) (4 * 3 + 1) = (6 - 5) (12 + 1) = 1 (13) = 13.

b) x = 3, maka f(3) = 2 * 3 + 2 / 5 * 3 - 7 = 6 + 2 / 15 - 7 = 8 / 8 = 1

c) x = 3, maka f(x) = 7x² - 10x + 6x² = (7 + 6)x² - 10x = 13x² - 10x = 13 * 3² - 10 * 3 = 169 - 30 = 139.