cindy says she found a shortcut for doing multipication problems .when she multiplies 3 times 24 ,she says, 3 times 4 is 12 ones
2 answers:
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Answer:
Step-by-step explanation:
Given the Pythagorean Identity:
We want to solve for sin(C).
First, we will subtract cos²(C) from both sides:
Next, we will take the square root of both sides. Since we are taking an even-root, we will need to add plus/minus. Hence:
Answer:
(x² - 3)(x² + 3)
Step-by-step explanation:
- 9 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b) , thus
- 9
= (x² )² - 3²
= (x² - 3)(x² + 3)