First of all you need to expand this expression. you do this by multiplying the number outside the brackets with each term inside the brackets. this is the first one ; 3 x 2a = 6a, 3 x 5 = 15. the extra + sign in the first brackets stays between the two terms, so the first set of brackets is now 6a + 15. now we have to look at the second ; 5 x a = 5a, 5 x 2 = 10, like the extra + sign, the extra - sign stays between the two terms as well, so the second bracket is now 5a-10. you put them together to get 6a + 15 + 5a - 10.
next you need to simplify the expression. first you need to group like terms, e.g. the numbers and the letters. <u>6a</u> + <em>15 </em><u>+5a</u> <em>-</em><em>10.</em> the 6a + 5a = <em><u>11a</u></em> and the 15 - 10 = <u><em>+</em></u><em><u>5</u></em>. you then put these two terms together to get your final answer of <em><u> </u></em> <u><em>11a + 5</em></u>
Take the first bracket and it's multiplication, 3(2a+5) You expand my multiplying everything inside the bracket by the number outside. 3*2a = 6a 3*5 = 15 Then multiply out the second bracket, 5(a-2) 5*a = 5a 5*-2 = -10 So now you have 6a + 15 + 5a - 10 Simplify it by collecting like terms, and you have: 11a + 5 And that's the answer, hope I helped!
