Question

Date:
(J3 + J11 J2 (3- /112 Semplify the following is​

Answer 1

Answer:

Step-by-step explanation:

1. Solve the following quadratic equations for ‘x’ :-

(i) x x

2 2 50

Use the quadratic formula :-

For an equation of the form Ax Bx C 2 0

   x

B B AC

A r 2 4

2

Therefore, for x x

2 2 50

   x r uu

u

2 2 415

2 1

2

=

r 2 4 20    

2

=

r 2 16

2

=

r u 2 1 16 r

2

24 1

2

( ) By determining the square root of 16 and

bringing it outside the square root term.

Now 1 is denoted by j (this is what we defined !)

Therefore, r 24 1 r

2

2 4

2

() j

So the two answers for ‘x’ are

2 4

2

1 2 j j By dividing every term by a factor of 2

or

2 4

2

1 2