Advertisements
Advertisements
Question
Simplify 3x (4x −5) + 3 and find its values for x = `1/2.`
Advertisements
Solution
3x (4x −5) + 3
`12x^2 - 15x + 3`
For `x = 1/2`,
= `12(1/2)^2 - 15(1/2) + 3`
=`12 xx 1/4 - 15/2 + 3`
= `3 - 15/2 + 3`
= `6 - 15/2`
= `(12 - 15)/2`
= `(-3)/2`
APPEARS IN
RELATED QUESTIONS
Carry out the multiplication of the expression of the following pair.
4p, q + r
Carry out the multiplication of the expression of the following pair.
a + b, 7a2b2
Carry out the multiplication of the expression of the following pair.
a2 − 9, 4a
Carry out the multiplication of the expression of the following pair.
pq + qr + rp, 0
Complete the table.
| First expression | Second Expression | Product | |
| (i) | a | b + c + d | ... |
| (ii) | x + y − 5 | 5 xy | ... |
| (iii) | p | 6p2 − 7p + 5 | ... |
| (iv) | 4p2q2 | p2 − q2 | ... |
| (v) | a + b + c | abc | ... |
Find the product.
(a2) × (2a22) × (4a26)
Find the product.
`(2/3 xy) xx ((-9)/10 x^2y^2)`
Find the product.
`(-10/3 pq^3) xx (6/5p^3q)`
Find the product.
x × x2 × x3 × x4
Simplify 3x (4x − 5) + 3 and find its values for x = 3.
