(x+3)(x+4)=x2+7x+12
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then 4 plus 3 equals 28 and 3 plus 3 equals 18 and 7 plus 5 equals 84 .... its easy you just have to multiply the answer with the first number.. for example : 2 plus 3 equals 5 but when you multiply the answer with the first number (2) it becomes equals 10, and so on the others..
144, you add the plus numbers, then multiply it by the first.
144, you add the plus numbers, then multiply it by the first.
42
6+1 equals 7. Plus 3 equals 10. Plus 4 equals 14.