True False[1 Marks ]

Questions

5 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark

x² - 3x + 5 is 3.

Answer

False.
Solution:
The coefficient of x in -3

Question 21 Mark

in -x, the constant term is -1.

Answer

False.
Solution:
The coefficient of x is -1.

Question 31 Mark

If a = 2 and $\text{b}=\frac{1}{2}$, then the value of ab (a² + b²) is $4\frac{1}{4}$

Answer

True.
Solution:
$(\text{a}^2+\text{b}^2)$
$=\Big[2^2+\Big(\frac{1}{2}\Big)^2\Big]$
$=4+\frac{1}{4}$
$=4\frac{1}{4}$

Question 41 Mark

(5x - 7) - (3x - 5) = 2x - 12.

Answer

False.
Solution:
LHS = (5x - 7) - (3x - 5) = 5x - 7 - 3x + 5 = 2x - 2.
LHS = RHS

Question 51 Mark

(3x + 5y)(3x - 5y) = (9x² - 25y²).

Answer

True.
Solution:
LHS = (3x + 5y)(3x - 5y)
= 3x (3x - 5y) + 5y (3x - 5y)
= 9x² - 15xy + 15xy - 25y²
= 9x² - 25y²
L.H.S = R.H.S.

MATHS True False[1 Marks ]