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If a ＜ 0, simplify 2A - 3A / │ 3A - A
5a/-4a=-5/4
uncertain
If a ＜ 0, try to simplify 2A - | 3a | / | 3a | - A|
2a-|3a|/||3a|-a|
=（2a+3a）/l-3a-al
=5a/-4a
=-5/4
If you don't understand this question, you can ask,
3a^3+2a-0.75a^3+0.5a-0.6a^3-1/3a a=12
emergency
Solution
3a³+2a-0.75a³+0.5a-0.6a³-1/3a
=(3a³-0.75a³-0.6a³)+(2a+0.5a-1/3a)
=1.65a³+(2.5a-1/3a)
=1.65a³+(5/2a-1/3a)
=1.65×12³+13/6a
=2851.2+26
two thousand eight hundred and seventy-seven point two
A ^ 2-2a-3 = 5 find 6-3a ^ 2 + 6A
Method 2: A ^ 2-2a-3 = 5, a-2a-8 = 0 (A-4) (a + 2) = 0 or a = - 2, 6-3a ^ 2 + 6A = 6-3 × 16 + 24 = - 18 or 6-3a ^ 2 + 6A = 6-3 × 4-12 = - 18 6-3a ^ 2 + 6A = - 18
(a-15)/(2a^2+6a)+(9-3a^2)/(9-a^2)-3
There is a brief process, and the title is a little boring,
Calculate, calculate the result
(a-15)/(2a^2+6a)+(9-3a^2)/(9-a^2)-3=(a-15)/[2a(a+3)]+3(3-a^2)/(3+a)(3-a)-3=[(a-15)(3-a)+(9-3a^2)(2a)]/[2a(a+3)(3-a)]-3=(3a-a^2-45+15a+18a-6a^3)/[2a(a+3)(3-a)]-3=(-6a^3-a^2+36a-45)/[2a(a+3)(3-a)]-3=(-6...
2A + B = 1 - √ 3A + B = - 5 what are a and B equal?
B = - 2A, so - radical 3a-2a = - 6, so a = 6 divided by 2 + radical 3, B = - 12 divided by 2 + radical 3
4（2a+3）^2-（3a-b）^2
=[2(2a+3)+(3a-b)][2(2a+3)-(3a-b)]
=[4a+6+3a-b][4a+6-3a+b]
=(7a-b+6)(a+b+6)
The first step is to find out why it's like that,
If 3 ≤ a ≤ 10, 2a is less than or equal to B
∴3a≤a+b＜4a
∴30≤a+b＜40
If you don't understand this question, you can ask,
If we know the equal ratio sequence a, 2A + 2, 3A + 3, then the fourth term is?
From (2a + 2) / a = (3a + 3) / (2a + a), we can get a = - 1 or - 4. When a = - 1, 2A + 2 = 0, does not meet the condition of equal ratio sequence, so a = - 4, then A1 = - 4, A2 = - 6, A3 = - 9, that is, the general ratio q = 3 / 2, then the fourth term of equal ratio sequence A4 = - 9 * 3 / 2 = - 27 / 2
If a, 2A + 2.3A + 3 form an equal ratio sequence, find the value of real number a
If a, 2A + 2.3A + 3 is equal ratio sequence
Then (2a + 2) ^ 2 = a (3a + 3)
4(a+1)^2=3a(a+1)
Because the term of the equal ratio sequence is not zero
So a is not equal to - 1
So 4 (a + 1) = 3A
So a = - 4
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