Current location - Training Enrollment Network - Mathematics courses - Mathematics problems in grade three
Mathematics problems in grade three
1. solution: let the two roots of the equation be x? ,x? , then

x? +x? =2a﹣ 1

x? x? =4(a - 1)

Equation about x x2-(2a-1) x+4 (a-1) = 0 Two roots are the lengths of two right-angled sides of a right-angled triangle with a hypotenuse length of 5.

∴x+x=5?

∴﹙x? +x? ﹚? ﹣2x? x? =25

∴﹙2a﹣ 1 ﹚? ﹣ 8(a - 1﹚=25

∴a? =4,a? = 1

∫A = 1[—(2a— 1)]? ﹣4×4(a - 1)8.5

The solution that satisfies the meaning of the problem is x = 10.

When x= 10, 35-2x= 15.

Answer: The length and width of the chicken farm are 15m and 10m respectively.