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Answer:
Look below...
Step-by-step explanation:
Note: Check for errors...
1. 5x² + 6x = 3
Standard Form:
5x² + 6x = 3
5x² + 6x - 3 = 3 - 3
5x² + 6x - 3 = 0
Answer: a = 5, b = 6, and c = -3
2. 3x( x + 2 ) = 6
Standard Form:
3x( x + 2 ) = 6
3x² + 6x - 6 = 6 - 6
3x² + 6x - 6 = 0
Answer: a = 3, b = 6, and c = -6
3. ( x + 4 ) ( x - 6 ) = 15
Standard Form:
( x + 4 ) ( x - 6 ) = 15
( x² - 6x + 4x - 24 ) - 15 = 15 - 15
x² - 2x - 24 - 15 = 0
x² - 2x - 39 = 0
Answer: a = 1, b = -2, and c = -39