Question

x la a doua minus 7x minus 30 egal x la a doua minus 9 x minus 52​

Answer 1

${x}^{2} - 7x - 30 = {x}^{2} - 9x - 52$

${x}^{2} - {x}^{2} - 7x - 30 = - 9x - 52$

$- 7x - 30 = - 9x - 52$

$- 7x + 9x - 30 = - 52$

$2x - 30 = - 52$

$2x = - 52 + 30$

$2x = - 22$

$x = - 22 \div 2 = - 11$

Answer 2

Răspuns:

x²-7x-30=x²-9x-52

eliminam x² (termenii care sunt egali)

=> -7x-30=-9x-52

-7x+9x=-52+30

2x=-52+30

2x= -22

x= -22:2

x = - 11