Why 3x-2 (- x? (x-1) + 5) = - 3x + 2x? (x-1) - 10

Why 3x-2 (- x? (x-1) + 5) = - 3x + 2x? (x-1) - 10

First count bracket 3 [1]=
3-3, and then use? X-6 + 10 to multiply the two products - 2x? X-6 + 10 minus 2x-3x, which is equal to - 3x + 2 (x-1) - 10

(X-5) (x + 2) why = x ^ 2-3x-10

(X-5)(X+2)
=X · x + X · 2-x · 5-2 · 5 (multiply each item in the first bracket by each item in the second bracket)
=X & sup2; - 3x-10 (simplification)

(X-5) (x + 2) why = x ^ 2-3x-10

=x(x+2)-5(x+2)
=x^2+2x-5x-10
=x^2-3x-10

If x ^ 2 x = 1, then the value of 3x ^ 2 x 3x-5 is

3x²+3x-5=3(x²+x)-5=3×1-5=-2