7. TBQ - Frame the correct expressions

Some simplifications of algebraic expressions are done below. The expression on the right-hand side should be in its simplest form. Observe each of them and see if there is a mistake. If you think there is a mistake, try to explain what might have gone wrong. Then, simplify it correctly.

 

S.No	Expression	Simplest form	Correct simplest form
1	\(3 + (x + 1)\)	\(3x - 3\)	\(3x + 4\)\(x - 4\)\(3x - 4\)\(x + 4\)
2	\(3(2w+3x+4r)\)	\(6w+9x+15r\)	\(6w + 9x + 15r\)\(6w + 9x + 12\)\(6w + 9x + 12r\)\(3w + 9x + 12r\)
3	\(1j+2k+3h+4\)	\(1(j+2k+3h+4)\)	\(1(j+2k+3h+4)\)\(1(j+2k+3h)\)\(1(2j+3k+4h)\)\(1(2j+3k+4h+5)\)