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4. 24 = 23 x 3 36 = 22 x 32 64 = 26 hcf = 22 = 4
24 = 23 x 3 64 = 26 88 = 23 x 11 factors in common: 23... 1, 2, 4 & 8
26 The reason is, -25 and 25 cancel each other out. -24 and 24, -23 and 23, etc. cancel each other out. In the end, you are left with 26.
xy=24 and y=23-x so x(23-x)=24, which is x2-23x+24 = 0, and you solve this using the formula method to get approximately 21.95 and 1.05 If the product had been 23 and the sum 24 the equation would have factorized easily and you would have 1 and 23
24 and 2 2 X 24=48 2+24=26