Question

Write down the each value of each expression for each value of x : a) x² + 3 b) 21 - 3x² c) 5(3x + 4)​

Answer 1

a) x³ + 3

If x is 1, 1³ + 3 = 4

If x is 2, 2³ + 3 = 11

b) 21 - 3x²

If x = 1, 21 - 3 = 18

If x = 2, 21 - 12 = 9

c) 5(3x + 4)

If x = 1, 5(7) = 35

If x = 2, 5(10) = 50

Answer 2

x^2+3. b) 21-3x^2

x =1. x =1

1^2+3. 21-3×1^2

1+3=4. 21-3=18

x = 2 x=2

x^2+3. 21 - 3x^2

2^2+3. 21-3×2^2

4+3. 21-3×4

7. 21-12=9

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