Algebramedium · Past Paper
Simplify: (2x + 3)^2 - (2x - 3)^2.
A18
B24x
C8x^2
D0
✓ Correct Answer: B — 24x
Using (a+b)^2 - (a-b)^2 = 4ab, we get 4(2x)(3) = 24x.
Share this question
More from Algebra
- The factors of a^2 + ab are:
- If a and c have opposite signs, then the roots of ax^2 + bx + c = 0 are:
- A boat travels 24 km upstream in 6 hours and 24 km downstream in 3 hours. Find the speed of the boat in still water.
- If 2^x + 3^y = 17 and 2^(x+1) - 3^y = 7, find x.
- For what value of 'p' does the system of equations px + 2y = 5 and 3x + y = 1 have no solution?