solve the following questions. 1.. simplify 3x (4x-5)+3 and find its value. a. x=3. b. x=1 upon 2
Answers
Answered by
0
Answer:
(a) x = 3
⇒ 3x(4x - 5) + 3
⇒ 3 × 3(4 × 3 - 5) + 3 [put the value of x = 3]
⇒ 9(12-5 )+ 3
⇒ 9 × 7 + 3
⇒ 63 + 3
⇒ 66
Now,
(b) x = \bf \frac{1}{2}21
⇒ 3x(4x - 5) + 3
⇒ 3 × \bf \frac{1}{2}21 (4 × \bf \frac{1}{2}21 - 5) + 3 [pu the value of x = \bf \frac{1}{2}21
⇒ \bf \frac{3}{2}23 (2 - 5) + 3
⇒ \bf \frac{3}{2}23 (-3) + 3
⇒ \bf \frac{-9}{2}2−9 + 3
⇒ \bf \frac{-9 + 6}{2}2−9+6
⇒ \bf \frac{-3}{2}2−3
please mark me as a brainlist
Answered by
0
:
Mark Me As Brainliest And Thank Me If The Answer Is Useful.
-- :
3x(4x−5)+3=12x^2−15x+3
x=3 gives the value 12(9)−15×3+3
=108−45+3
=66
x=1/2 gives the value 12(1/4)−15×(1/2)+3
=3−7.5+3
= - 3/2
Similar questions