Expressions

Find out value of expressions if a = -1, b =2:

x=b - 2a - ab
y=a3 - b2 - 2ab
z=a2 b3 - a3 b2
w=a + b + a3 - b2




Correct answer:

x =  6
y =  -1
z =  12
w =  -4

Step-by-step explanation:

a=1 b=2 x=b2 aa b=22 (1)(1) 2=6
y=a3b22 a b=(1)3222 (1) 2=1
z=a2 b3a3 b2=(1)2 23(1)3 22=12
w=a+b+a3b2=(1)+2+(1)322=4



Did you find an error or inaccuracy? Feel free to write us. Thank you!



avatar







You need to know the following knowledge to solve this word math problem:

Related math problems and questions:

  • Expression 8
    expr Evaluate this expressions: a) 5[3 + 4(2.8 - 3)] b) 5×(8-4)÷4-2
  • Find the 6
    pc_smile Find the total cost of 10 computers at $ 2100 each and seven boxes of diskettes at $12 each.
  • Jakub
    numbers2 Jakub multiplied 11 times the number 100 by ten and then divided the result ten times by 10. What number did he get?
  • Simple equation
    eq1 Find the value of x in 21-3x=x+1
  • Adding mixed 3
    mixed_fractions Why does 1 3/4 + 2 9/10 equal 4.65? How do you solve this?
  • Fractions
    cmp_fractions Sort fractions z1 = (6)/(11); z2 = (10)/(21); z3 = (19)/(22) by its size. Result write as three serial numbers 1,2,3.
  • Wood
    wood_cube Wood cube with edge 11 cm weights 0.753 kg. What weight have 10, 100 and 1000 these cubes?
  • Expression 1
    plus_minus_mult What is 7+8-(5×2)+5-4+(6×(5-3)+6)-(8+10)-7+6?
  • Find area
    rectangle Find area of a rectangle with a length of 58 foot and a width of 49 foot?
  • Add symbols
    plusminus Add marks (+, -, *, /, brackets) to fullfill equations 1 3 6 5 = 10 This is for the 4th grade of the primary school - with no negative numbers yet
  • Evaluate expression
    plusminus If x=2, y=-5 and z=3 what is the value of x-2y
  • Valid number
    numbers Round the 453874528 on 2 significant numbers.
  • Divide
    ruler2 Divide substance 110 cm long to two parts so that it first part is 10 cm longer than the second part and one part will be 10 times longer than the second portion. How long the parts will be?
  • Outside temperature
    teplomer The temperature outside was 57 degree Fahrenheit. During the next few hours it decreased by 18 degrees and then increased by 23 degrees. Find new temperature.
  • The temperature
    teplomer The temperature at 1:00 was 10 F. Between 1:00 and 2:00, the temperature dropped 15F. Between 2:00 and 3:00, the temperature rose 3F. What is the temperature at 3:00?
  • 3 cats
    mouse 3 cats eat 3 mice in 3 days. How many mice will be eaten by 10 cats in 10 days?
  • The largest number
    num Find the largest integer such that: 1. No figures is not repeat, 2. multiplication of every two digits is odd, 3. addition all digits is odd.