3 years ago

Factor by grouping:

2 answers:

3 0

$(x-y)^2=x^2-2xy+y^2\\---------------------------\\\\4-12r+9r^2=2^2-2\cdot2\cdot3r+(3r)^2=(2-3r)^2$

$other\ method:\\\\4-12r+9r^2=4-6r-6r+9r^2=2(2-3r)-3r(2-3r)\\\\=(2-3r)(2-3r)=(2-3r)^2$

faust18 [17]3 years ago

3 0

Because:
$(a-b)^2=a^2+2ab+b^2$

You might be interested in

What is the circumference

IRINA_888 [86]

25.1 yards
multiply the radius by 2 and multiply that number with pi and you get your answer of 25.1 yards

8 0

2 years ago

What is the system of equations for 2x + 2y = 10 and 5x - 2y=4?

vagabundo [1.1K]

$2x + 2y = 10 \\ 5x - 2y = 4 \\ 7x = 14 \\ x = 2 \\ \\ 2(2) + 2y = 10 \\ 4 + 2y = 10 \\ 2y = 6 \\ y = 3$
(2,3)

8 0

3 years ago

Read 2 more answers

What is the error in the equation

dimulka [17.4K]

Answer:

The fifth line contains the error.

Step-by-step explanation:

Line 1 is the equation.

Lines 2, 3, and 4 are correct.

The error is in the 5th line.

The square root of a negative number is not a real number, so if this problem is solved only with real numbers, there is no solution.

If imaginary numbers are allowed, then the last line should read:

$x = \pm\dfrac{i\sqrt{11}}{2}$

4 0

2 years ago

Use the information in the picture.

Katarina [22]

Yes, parallelogram congruent angles theorem

8 0

3 years ago

Mr lin has 10 baesball his gym make 4 teams

spin [16.1K]

Answer:

Mr. Lin can only have 2 people in his 4 teams but he will have 2 people without a group

Step-by-step explanation:

It would be better if he had 5 teams because everyone will be able to be in a team

4 0

3 years ago