Solved tasks in mathematics
Solved tasks in mathematics, mathematics, math, equation, surface of the pyramid, surfaces of the cube, mathematical tasks, solved tasks, polynomials, binomi, Mathematics for the high school, mathematics for elementary school, fractions
Thursday, April 25, 2013
Thursday, April 18, 2013
Wednesday, April 17, 2013
Quadratic equation solver (High School)
(2x-15)(2x-7)-(x-36)(x-8)+36=0
4x²-14x-30x+105-(x²-8x-36x+288)+36=0
4x²-14x-30x+105-x²+8x+36-288+36=0
3x²-147=0
3x²=147
x²=147/3
x=√49
x1=+7 x2=-7
Division of complex numbers
i2 = −1
3-5 i/7+2 i=3-5 i/7+2 i*7-2 i/7-2 i=21-6 i-35 i+10 i²/7²+2²=21-10-41 i²/49+4=
=11-41 i/53=11/53-41/53 i
Proper quadrilateral prism (primary school)
Calculate the surface proper quadrilateral prism if the base edges 4cm and 8cm high.
Solved:
Solved:
a=6cm M=3a*H P=2B+M
H=8cm M=3*6*8 P=2*9√3+144
B=a²√3/4 M=18*8 P=18√3+144 cm²
B=6²√3/4 M=144cm²
B=36√3/4
B=9√3
Cube surface (primary school)
The sum of the length of the edge of a cube is 48cm. Calculate the surface.
Solved:
Solved:
O=48cm P=6a²
O=12a P=6*4²
48=12a P=6*16
a=48:12 P=96cm²
a=4cm
Surfaces of the cube (primary school)
Calculate the surface of a cube if the diagonal 3√2
Solved:
Solved:
d=a√2 P=6a²
3√2=a√2 P=6*3²
a=3cm P=6*9
P=54cm²
Subscribe to:
Posts (Atom)