Question

(4x+6)(x-3)-(x-1)(3x+2) если x=-7

Answer 1

(4x+6)(x-3)-(x-1)(3x+2)
4х^2-12х+6х-18-3х^2-2х+3х+2=х^2-5х-16=-7^2-5*(-7)-16=49+35-16=68

Answer 2

To evaluate the expression (4x+6)(x-3)-(x-1)(3x+2) when x=-7, we substitute x with -7 in the expression and simplify.

Let's calculate step by step:

First, substitute x with -7: (4(-7)+6)(-7-3)-(-7-1)(3(-7)+2)

Simplify inside the parentheses: (-28+6)(-10)-(-8)(-21+2)

Perform the additions and subtractions inside the parentheses: (-22)(-10)-(-8)(-19)

Multiply the terms: 220-(-152)

Simplify the subtraction: 220+152

Calculate the sum: 372

Therefore, when x=-7, the expression (4x+6)(x-3)-(x-1)(3x+2) evaluates to 372.