Question

a) 103^2 - 102^2 = _ X (103 - 102).
b) (x + 3)^2 - x - 3 = (x + 3) x
c) If a polyhedron has 12 faces and 20 vertices, it will have
number of edges​

Answer 1

Answer:

a . (103+102)

103+102)b. ×^2+9 +6x-x-3 = x^2 +6+5x = (×+3)(×+2)

103+102)b. ×^2+9 +6x-x-3 = x^2 +6+5x = (×+3)(×+2)c. v+f-e =2

103+102)b. ×^2+9 +6x-x-3 = x^2 +6+5x = (×+3)(×+2)c. v+f-e =2 20+12-e =2

103+102)b. ×^2+9 +6x-x-3 = x^2 +6+5x = (×+3)(×+2)c. v+f-e =2 20+12-e =2 e = 30 ok

Answer 2

Step-by-step explanation:

provided with three test tubes. One of them contains distilled water and the other two have an acidic solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube? 6. HCI, HNO, C,H,OH