kalikan (3a+5)(4a-2) = kuadratkan (3x-7)² =

(3a + 5)(4a - 2) = 12a² - 6a + 20a - 10
= 12a² + 14a - 10

(3x - 7)² = (3x)² - 2(3x)(7) + 7²
= 9x² - 42x + 49

a, 14a^2-6a+20a-10=14a^2+14a-10
b.9x^2-42x+49