Question

x+9=(x-3)2

(4x-6)2=(x-4)(x-9)

)2-do kwadratu

Answer 1

a)

x+9=(x-3)²

x+9=x²-6x+9

x=x²-6x

-x²+7x=0

x(-x+7)=0

x=0 ∨ x=7

 

b)(4x-6)²=(x-4)(x-9)

16x²-48x +36 = x² -9x -4x +36

16x² -48x +36 = x² -13x +36

16x²-48x =x²-13x

15x²-35 x= 0

3x² - 7x=0

x(3x-7)=0

x=0 ∨ x=2⅓