twalters88
02.09.2019 •
Mathematics
Evaluate 4(a^2 + 2b) - 2b when a = 2 and b = –2.
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Ответ:
4
Step-by-step explanation:
4(2^2 + (2 * -2)) - (2 * -2)
2^2 = 4
4(4 + (2 * -2)) - (2 * -2)
2 * -2 = -4
4(4 + -4) - -4
- -4 = + 4
+-4 = -4
4(4 -4) + 4
4 - 4 = 0
4(0) + 4
4 * 0 = 0
0 + 4
0 + 4 = 4
4
Ответ:
Step 1: add what is inside the parenthesis
9 + 1.34 + 1 2 (5.24)
Step 2: multiply what is inside the parenthesis by 12.
9 + 1.34 + 62.88
Step 3: Add all the numbers
73.22
answer
9 + 1.34 + 1 2 (3.50 +1.74) = 73.22