Question

Решите уравнение (4x + 1)^2 - (3 + 4x) (4x - 3) = 42

Answer 1

16x²+8x+1-(16x²-9)=42

16x²+8x+1-16x²+9=42

8x+10=42

8x=42-10

8x=32

x=4

Answer 2

(4x+1)^2-(3+4x)(4x-3)=42
16x^2+8x+1- 16x^2+9=42
8x=42-10
8x=32
x=32:8
x=4

ответ 4