Question

simplify 3x (4x-5)+3 and find its values for (i) x=3 (ii) x=1/2​

Answer 1

Answer:

Step-by-step explanation:

3x(4x-5) +3

3(3) ×(4(3) -5) +3

9×12-5+3

=66

Answer 2

Answer:

(i)66 (ii)-3/2

Step-by-step explanation:

Given

3x(4x - 5 ) + 3

(i) x = 3

3 (3) [ 4(3) -5 ] + 3 = 9[ 12 - 5 ] +3

= 9[ 7 ] + 3

= 63 + 3

= 66

(ii) x = 1/2

$3( \frac{1}{2} )(4( \frac{1}{2} ) - 5) + 3$

$= \frac{3}{2} (2 - 5) + 3$

$= \frac{3}{2} ( - 3) + 3$

$= \frac{ - 9}{2} + 3$

$= \frac{ - 9 + 6}{2}$

$= \frac{ - 3}{2}$

I WILL BE HAPPY IF THIS

ANSWER HELPED U