Question

8x²=60-7x² incompleta (SEM BHASKARA) plssss

Answer 1

$8x\²=60-7x\² \\ 8x^2 + 7x^2 = 60 \\ 15x^2 = 60 \\ x^2 = 60 \div 15 \\ x^2 = 4 \\ x = +- \sqrt{4} \\ \bf{\underline{x = +- 2 }} \\ \\ \\ \boxed{\boxed{\bf{ Resposta: S = ( -2 , 2) }}}$