F(x)= 7 x² + 42 x = 7 ( x² + 6 x ) = 7 ( ( x² + 6 x + 9 ) - 9 ) =
= 7 ( x + 3 )² - 63 (vertex form)
Answer: D)
Infinite
Working
By using the formula
(change in y)/(change in x)= gradient m
=(5-0)/(-2--2)
=5/0
Answer:
1). 
2). 
Step-by-step explanation:
In this question we have to write the fractions in the factored form.
Rational expressions are
and
.
1).
Factored form of the denominator (x² - x - 12) = x² - 4x + 3x - 12
= x(x - 4) + 3(x - 4)
= (x + 3)(x - 4)
Therefore. 
2). 
Factored form of the denominator (x² - 16) = (x - 4)(x + 4)
[Since (a²- b²) = (a - b)(a + b)]
Therefore, 
Answer:
25
Step-by-step explanation: