Question

simply the expression and find value if x=3, a=-1, b=-2, 3x-5a-x^2+9b​

Answer 1

Answer:(i) x=3,a=−1,b=−2

3x−5−x+9

⇒(3x−x)−5+9

⇒2x+4

⇒2(x+2)

⇒2(3+2)

⇒10.

(ii) 2−8x+4x+4.

⇒(2+4)−8x+4x

⇒6−4x

⇒6−4(3)

⇒6−12

⇒−6.

(iii) 3a+5−8a+1

⇒(3a−8a)+(5+1)

⇒−5a+6

⇒−5(−1)+6

⇒11.

(iv) 10−3b−4−5b

⇒(10−4)−(3b+5b)

⇒6−8b

⇒6−8(−2)

⇒22.

Step-by-step explanation: If i am wrong sorry but Good Luck

Answer 2

Step-by-step explanation:

x=3, a= -1, b= -2

3(3)-5(-1)-(3)^2+9(-2)

9+5-9-18

14-9-18

5-18

ans= -18