Chứng minh các đẳng thức sau: a) 2(x² + y²) = (x + y²) + ( x- y)²
b) (a + b)² - (a-b) (a+ b) = 2b ( a+ b )
c) x² + y² = ( x+ y²) - 2xy

What is the solution of sqrt x+2-15=-3

Plzzzz i beg u asap ! what is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Need an artist designed a badge for a school club. figure abcd on the coordinate grid below shows the shape of the badge: the badge is enlarged and plotted on the coordinate grid as figure jklm with point j located at (2, -2) and point m is located at (5, 4). which of these could be the coordinates for point l? a. (2, 4) b. (8, 4) c. (5, 1) d. (5, 7)