Question

Alguém me ajuda nessas expressões:1) x=40-[5²+(2²-7)]=2) x=15+(-4)(+3)-10=3)x= √9 x 2 -(-4)=4)x=7²- 4 x 2+3=

Answer 1

1) x=40-[5²+(2²-7)]= 40 -[ 25 + (4-7)] ==> 40 - [ 25-3] ==>40-22==>18

2) x=15+(-4)(+3)-10= 15-12-10 ==> - 7

3)x= √9 x 2 -(-4)= 3x2 + 4 ==> 6+4 ==> 10

4)x=7²- 4 x 2+3= 49 - 8+3 ==> 44