If the quadratic coefficient of equation - 5x + 6x + 3 = 0 is changed to one, why can the equation be changed?

If the quadratic coefficient of equation - 5x + 6x + 3 = 0 is changed to one, why can the equation be changed?

-5x^2+6x+3=0
Divide both sides by (- 5) at the same time to get the equation with quadratic coefficient of 1
x^2-(6/5)x-3/5=0

Given a ＞ 2, B ＞ 2, try to judge whether the equation X2 - (a + b) x + AB = 0 and X2 ABX + (a + b) = 0 have common roots. Please explain the reason

Let x 2 - (a + b) x + AB = 0 and X 2-abx + (a + b) = 0 have common roots. If x 0 is set, then x 20 − (a + b) x 0 + AB = 0. ① x 20 − ABX 0 + (a + b) = 0. After sorting, we can get (x 0 + 1) (a + b-ab) = 0. ∵ a > 2, b > 2, ∩ a + B ≠ AB, ∩ x 0 = - 1. It is impossible to substitute x 0 = - 1 into (1) to get 1 + A + B + AB = 0

The composition of a biological base is purine base accounting for 58%, pyrimidine base accounting for 42%
A. Bacteriophage T4
B. Bacteria
C. Tobacco mosaic virus
D. Yeast and human

A. The percentage of base pyrimidine is not equal. It must contain RNA (ribosome)
The virus has only DNA

The shop brought in a batch of washing machines and sold 24 of them. The ratio of the number sold to the number left is 3:5. How many washing machines are there in total?

24 △ 3 × 5, = 8 × 5, = 40 (sets); 40 + 24 = 64 (sets); answer: there are 64 washing machines in total

3 4 5 6 on page 36 of mathematics book Volume 2 of grade 5
If the formula is good, I will always add points

Title?

How to solve the equation 40x + (X-10) - 58 = 10x + (X-10)?

40x+（x-10）-58=10x+（x-10）
40x+x-10-58=10x+x-10
40x+x-10x-x=58+10-10
30x=58
x=58/30
x=29/15

How to multiply 102 by 37

102 times 37
=【100＋2】×37
=100×37＋2×37
=3700＋74
=3774

The supermarket brought in 9 cases of cups, 10 in each case and 8 in each box. How many cups did the supermarket bring in
9x10 stands for () 9x10x8 stands for ()
10x8 means () 10x8x9 means ()

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The price of a TV set is 1700 yuan now, which is 300 yuan lower than the original price
A chemical fertilizer plant produced 1104 tons of chemical fertilizer in July, 144 tons more than the plan, which is several percent of the plan

300 / (1700 + 300) * 100% = 15% decrease 15% 1104 / (1104-144) * 100% = 115% complete 115% of the plan

It is known that the line y = KX + B passes through point a (0,6) and is parallel to y = - 2x
(1) Finding the analytic expression of function
(2) If this line passes through P (m, 2), find M
(3) The analytic formula of the line where OP is located
(4) Find the area bounded by the line y = 4K + B and the line OP and the x-axis

1. Because the two lines are parallel, so y = - 2x + B, substituting point a into y = - 2x + 6
2. Substituting point P into y = - 2x + 6 gives m = 2
3. 4. I don't know what OP means. It seems that it's not mentioned in the title?