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How much is x square plus x plus 1 equal to 0?

It can be divided into x square + X + quarter + three fourths = 0, that is, the square of (x + Half) = three fourths of negative, because the square can not be negative, so there is no solution

2 and 4 / several equals several divided by several equals 2.75 equals 16 / several equals 12 / several

2 and 3 / 4 = 11 △ 4 = 2.75 = 44 / 16 = 33 / 12

When m is an integer, the solutions X and y of the system x + y = m 5x + 3 y = 13 are nonnegative

X + y = m, ① 5x + 3Y = 13, ②, ② - ① × 3: 2x = 13-3m, that is, x = 13 − 3M2, substituting x = 13 − 3M2 into ①: y = 5m + 32, according to the meaning of the question: 13 − 3M2 ≥ 05m + 32 ≥ 0, the solution is: - 35 ≤ m ≤ 133, then the integer m = 0, 1, 2, 3, 4

Calculation: (0.22-0.2065) divided by (3.6 * 0.015) 0.00325 divided by 0.013 =?

17.31
First make 0.22-0.2065 = 0.0135
Then (3.6 * 0.015) 0.00325, first find out 3.6 * 0.015 = 0.054
Then 0.00325 of 0.054 = 0.06
So it's 0.0135 divided by 0.06 divided by 0.013 = 17.31

If the value of (X & # 178; + ax-2y + 7) - (BX & # 178; - 2x + 9y-1) has nothing to do with the value of the letter X, find the value of a and B
Come on, there's a reward after the answer

（x²+ax-2y+7）-（bx²-2x+9y-1）
=x²+ax-2y+7-bx²+2x-9y+1
=(1-b)x²+(a+2)x-11y+8
Because it has nothing to do with the value of X
therefore
1-b=0,b=1
a+2=0,a=-2
Do not understand welcome to ask

(78 + 52) × (120 ﹣ 60) (128-72) × 12 ﹣ 48 80 - (16.405 + 14.9) 68.7 - (44.6 + 0.375) 150 × 40 × 25 × 2 5625 ﹣ 75 + 25 × 32

（1）（78+52）×（120÷60）=130×2=260；（2）（128-72）×12÷48=56×12÷48=672÷48=14；（3）80-（16.405+14.9）=80-31.305=48.695；（4）68.7-（44.6+0.375）=68.7-44.975=23.725；（5）150×40×25×2=（150...

The upper bottom of a trapezoid is 3 meters, the lower bottom is 2 meters, and the height is 2 meters. The area of this trapezoid is 3 meters______ What is the area of a parallelogram equal to the sum of its upper and lower base______ ．

(3 + 2) × 2 / 2 = 5 × 2 / 2 = 5 (square meters) 5 × 2 = 10 (square meters) answer: the area of this trapezoid is 5 square meters; the area of the parallelogram with the same height as the sum of its upper and lower bottom is 10 square meters. So the answer is: 5; 10 square meters

This problem is: to solve the equation: X-1 and 1 / 3 + 2 / 5 = 6 / 21

1 / 2 / 3 / 1 / 5 / 2 = 5 / 3 / 7 = 5 / 3 × 7 / 5 = 25x-1 / 21 + 1 / 2 / 5 = 21 / 6 x-3 / 4 + 12 / 5 = 21 / 6 multiply both sides by 30 to get 30x-40 + 72 = 10530x + 32 = 10530x = 105-323x = 73