All categories

3 years ago

Expand, and simplify the following expressions a. (2x+y)(x+y) + (2x-y)(x+y)

Mathematics

2 answers:

tankabanditka [31]3 years ago

7 0

Step-by-step explanation:

2x²+2xy+yx+y²+2x²+2xy-yx+y²

2x²+2x²+2xy+2xy+yx-yx+y²+y²

2x²+2x²+2xy+2xy

4x²+4xy

ludmilkaskok [199]3 years ago

7 0

Your Answer is in the above image.

Hope this solution may help you

You might be interested in

One number is 1/2 of another number the sum of the two numbers is 27 find the two numbers

Art [367]

Filling up the space because it has to be 20 characters

4 0

3 years ago

William made 1/2 gallon of lemonade to divide equally among 3 people. How much lemonade will each person?

katovenus [111]

<span>a) 1/6 gallon all u need to do is divide</span>

8 0

3 years ago

Read 2 more answers

The mean age of a student book club is 14.2 years. A 27-year-old teacher is invited to join the club. How does the teacher’s age

MAXImum [283]

The new mean age will be greater than 14.2 years because the teacher is older than the previous mean.

3 0

3 years ago

Read 2 more answers

ABCD is a parallelogram. Find the value of x, y and z.

expeople1 [14]

Step-by-step explanation:

X+100=180(linear pair)

X=180-100

X=80

30+y+x=180(sum of angle of triangle)

Y=180-110

Y=70

6 0

2 years ago

Read 2 more answers

Solve 2cos ²y -siny -1=0 for 0° ≤y≤360°

natima [27]

$\displaystyle\bf\\2cos^2y -sin\,y -1=0~~~for~~0^o\leq y \leq360^o\\\\cos^2y=1-sin^2y\\\\2(1-sin^2y) -sin\,y -1=0\\\\2-2sin^2y-sin\,y-1=0\\\\-2sin^2y-sin\,y+2-1=0\\\\-2sin^2y-sin\,y+1=0~~~\Big|\times(-1)\\\\2sin^2y+sin\,y-1=0$

$\displaystyle\bf\\\boxed{\bf sin\,y=x}\\\\2x^2+x-1=0\\\\x_{12}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{-1\pm\sqrt{1-4\cdot2\cdot(-1)}}{2\cdot2}=\\\\=\frac{-1\pm\sqrt{1+8}}{4}=\frac{-1\pm\sqrt{9}}{4}=\frac{-1\pm3}{4}\\\\x_1=\frac{-1+3}{4}=\frac{2}{4}=\boxed{\bf\frac{1}{2}}\\\\x_2=\frac{-1-3}{4}=\frac{-4}{4}=\boxed{\bf-1}\\\\sin\,y=\frac{1}{2}\\\\\boxed{\bf y_1=\frac{\pi}{6}~~or~~(30^o)}\\\\\boxed{\bf y_2=\frac{5\pi}{6}~~or~~(150^o)}\\\\sin\,y=-1\\\\\boxed{\bf y_3=\frac{3\pi}{2}~~or~~(270^o)}$

5 0

3 years ago

Expand, and simplify the following expressions a. (2x+y)(x+y) + (2x-y)(x+y)​

Expand, and simplify the following expressions a. (2x+y)(x+y) + (2x-y)(x+y)