Quadratic Equation Exercise (English version)

Sumber Gambar: www.123rf.com

1.   Determine the root square from the following quadratic equation!

a.       x²+3x+2=0

b.      x²-5x+6= 0

c.       x²-x-72= 0

d.      x²-32x+240=0

e.      x²-3x-40= 0

f.        x²+2x-143= 0

2.      If  x²+2x+3= 0 has roots square x₁ and x₂, the value from :

a.       x₁+x₂

b.      x₁.x₂

3.      Determine the quadratic equation from the following roots square!

a.       x₁=-2 and x₂=5

b.      x₁=-7 and +x₂=-9

c.       x₁=1 and x₂= -6

d.      x₁=  dan x₂=  

4.        If the roots square of x²+2x+3= 0 are x₁ and x₂ , the new quadratic equation with roots square  x₁+4 and x₂+4 is ….

5.       Quadratic equation x²+2x+3= 0 has root square  x₁ and x₂, the new quadratic equation with roots square 5x₁ dan 5x₂ is ….

6.       The value of a so that the equation 2x²-3x+p+5=0 has one  real root is ….

7.       The length of rectangle is three more than that width. When the area of rectangle is 70 cm². Determine the length, width, and perimeter from that rectangle

8.       Umur Antok sekarang adalah dua kali umur Budi. Tiga tahun yang akan datang, hasil kali umur mereka adalah 135 tahun. Umur Antok tujuh tahun yang lalu adalah ….

9.       Amount from two number is 9, While the product from two number is 14. The number are....