2.1 False. The expression -5 does not equal 2(-5)2. The correct expression should be -5 = -50.
2.2
2.2.1 If x = 9, then 3 - 125 + x = 3 - 125 + 9 = -122 + 9 = -113.
2.2.2 If x = 9, then 3x + 4 = 3(9) + 4 = 27 + 4 = 31.
2.3 Given that c = a^2 + b^2, and a = 8, b = 6, we can plug in the values to calculate c:
c = (8)^2 + (6)^2
c = 64 + 36
c = 100
Therefore, c = 100 when a = 8 and b = 6.
2.1 State whether the following is true or false: − 5 =
2
(− 5)
2
Explain your answer. (3)
2.2 Find the value of the expression, if 𝑥 = 9
2.2.1 (3) 3 − 125 + 𝑥
2.2.2 3𝑥 + 4 (2)
2.3 If 𝑐 = 𝑎 , calculate if and (3) 2
+ 𝑏
2
𝑐 𝑎 = 8 𝑏 = 6
1 answer