MadeleineJ09id MadeleineJ09id Math Answered PLEASE HELP ME Solve the following quadratic equations. 1. 21-4x-x²= 0 2. 27+6s-x²= 0 3. 48-13x+x²= 0 4. 64x²-81= 0 5. 25a²-10a-1= 0 Please I need this tomorrow :(