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marta [7]
3 years ago
12

Solve each quadratic equation. a) 2(x + 5) (2x - 3) = 0

Mathematics
1 answer:
damaskus [11]3 years ago
8 0

Answer:

{4x}^{2}  + 14x - 30 \\

Step-by-step explanation:

2(x + 5)(2x - 3)\\ (2x + 10)(2x - 3)\\ 2x(2x - 3) + 10(2x - 3)\\ 4 {x}^{2}  - 6x + 20x - 30\\  {4x}^{2}  + 14x - 30\\

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Answer:

21.  ΔUYZ <u>Obtuse</u>

22. ΔBCD <u>Right or Rectangle</u>

23. ΔADB <u>Acute</u>

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25. ΔUWZ <u>Right or Rectangle</u>

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Step-by-step explanation:

We need to classify each triangle by its angles.

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Obtuse: The inner angle A is obtuse (more than 90 degrees). The other 2 angles are acute.

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ΔUXZ Acute  It has 3 acute angles (less than 90°).

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Step-by-step explanation:

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