Question

me ajude porfavor

Só a letra e) e f)

Answer 1

e)3*6^2+15=123      x=6



F)4*3^2-57=-21         x=3

Answer 2

e)
${3x}^{2} + 15 = 123 \\ {3x}^{2} = 123 - 15 \\ {3x}^{2} = 108 \\ {x}^{2} = 108 \div 3 \\ {x}^{2} = 36 \\ x = \sqrt{36} \\ x = 6$

f)
4x²-57=-21
4x²=-21+57
4x²=36
x²=36÷4
x²=9
x= 3