<h3>I'll teach you how to factor –3x² + 172 – 20</h3>
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–3x² + 172 – 20
Add/ subtract the numbers:
172-20 = 152
–3x² + 152
Your Answer Is –3x² + 152
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No, it isn't. Right triangle's side lengths follow the Pythagorean Theorum
a^2+b^2=c^2
if you plug it in..
12^2+14^2=19^2
if you solve it..
340=361
this isn't true so it isn't a right triangle
Answer:
120 for the first one
Step-by-step explanation:
Answer: step two
Step-by-step explanation:
The equation that has the same solution as x² + 8x + 15 = -4x is x = -6± √21.
<h3>
How do you solve the above equation?</h3>
Step 1 - Move terms to the left
x² + 8x + 15 = -4x
x² + 8x + 15-(-4x) = 0
Step 2 - Combine the terms
x² + 8x + 15 + 4x = 0
x² + 12x + 15 = 0
Step 3 - Apply the quadratic formula
x = (-b ± √(b² - 4ac) )/ 2a
Recall that form our equation:
a = 1
b = 12
c = 15
Thus, x = (-12 √(12² - 4 * 1 *15) )/2 *1
⇒x = -6 ± √21
Learn more about equations at:
brainly.com/question/2972832
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