Question

plz answer it .........​

Answer 1

x= -3

a)5-3x+9(-3)2

= 5-3(-3)+9(-9)

= 5-9-81

= 5-90

= -85

b)7x3-5x2+x-8

= 7(-3)3-5(-3)2+(-3)-8

= 7(-27)-5(9)-3-8

= -189-45-11

= -245

Answer 2

1)=>5-3(-3)+9(-3)`2

=>2(-3)+9×(-9)

=>-6+(-81) =>-6-81 => -85

2)7x`3-5x`2+x-8

=>7(-3)`3-5(-3)`2-3-8

=>7(-27)-5(-9)-11

=>-189+45-11

=>-189+34 =>-155

Please make my answer brainliest