49*9
you have to make it into a one variable equation 21 * 21 = 7 * 7 * X 441 = 49 * X 441/49 = X 9 = X
441
49 times (441 ÷ 9 = 49).
x2 - 42x + 441 = (x - 21)2
9 times 49 equals 441
(147,3)(63,7)(49,9)
49*9
441 x 2 = 882
Each of these factor pairs (multiply the numbers in parentheses) equals 441: (1, 441) (3, 147) (7, 63) (9, 49) (21, 21)
481
There are two correct answers: . . . positive 21 . . . negative 21
you have to make it into a one variable equation 21 * 21 = 7 * 7 * X 441 = 49 * X 441/49 = X 9 = X
441
441
49 times (441 ÷ 9 = 49).
22 x 441 = 9702