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Answer:
3(-2)² - 7 = 5
Step-by-step explanation:
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NOTE: <em>in this expression we have 3 operations : subtraction , multiplication and power.</em>
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RULE: <em>the rule about the order of operations says :</em>
<em>power comes first then multiplication then subtraction.</em>
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<u> »Calculate (power):</u>
<u />![= 3(4) - 7](https://tex.z-dn.net/?f=%3D%203%284%29%20-%207)
<u> »Calculate (multiplication):</u>
<u />![=12-7](https://tex.z-dn.net/?f=%3D12-7)
<u> »Calculate (subtraction):</u>
![=5](https://tex.z-dn.net/?f=%3D5)
:)