Question

7. Розв'яжи рiвняння
a) - 85,6. (8,78 -x) = 0;
б) (x - 2,34).(x + 3,5) = 0.

Answer 1

$- 85.6(8.78 - x) = 0\\ 8.78 - x = 0 \\ x = 8.78$

$(x - 2.34)(x + 3.5) = 0 \\ x _{1} = 2.34 \\ x _{2} = - 3.5$