WMA11 June 2022

• WMA11/01 Edexcel​​ IAL P1 June 2022, Q2 (Algebraic Expressions: Rationalising denominators)​​ 

In this question you must show all stages of your working.

Solutions relying on calculator​​ technology are not acceptable.

• Show that​​ 180-805​​ is an integer and find its value.​​ 

(2)

• Simplify​​ 

45-57-35

giving your answer in the form​​ a + b 5​​ where a and b are rational numbers.

(3)

SOLUTION

a-​​ Multiplying the numerator and deniminator by​​ 5.

180-805×55

180-805 x 55

900-4005

30-205 

105

2

b-​​ Multiplying the numerator and deniminator by​​ 7+35.

45-57-35

45-57-35 ×7+357+35

285+125-35-15549-95

25+1354

254+1345