goat561
17.07.2021 •
Mathematics
The quadratic equation $ax^2+20x+c=0$ has exactly one solution. If $a+c=29$, and $a
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Ответ:
a² + c² = 641
Step-by-step explanation:
Given :-
ax² + 20x + c has exactly one solution .a + c = 29 .For exactly one Solution ,
b² - 4ac = 0 20² - 4*a*c = 0 4ac = 400 ac = 100Also ,
a + c = 29 ( a + c)² = 29²a² + c² + 2ac = 841 a² + c² + 2*100 = 841a²+ c² = 841 - 200 a² + c² = 641Ответ:
Emilias inequality, x<6 is correct because the number of hours is less than it equal to 6. Emilias number line is correct. The endpoint is correctly filled in and the number line should be shaded to the left of the endpoint.