Question

C Given that a = 3, b = -5 and c = 6, evaluate each of the following

a) : 4x - 7y
b): ab power 2 - ac
c): b/a - c/b
d): b+c/a + a+c / b


​please do with explanation

Answer 1

Answer:

a) Can't be calculate as value of x and y is not given

b) 207

c) -7/15

d) -22/15

Step-by-step explanation:

According to the question a = 3, b = -5 and c = 6

So,

a): 4x - 7y

Can't be calculate as value of x and y is not given

b): ab power 2 - ac = (3 × -5)^{2} - (3 × 6) = 225 - 18 = 207

c): b/a - c/b = (-5/3) - (6/-5) = (-25 + 18) /15 = -7/15

d): b+c/a + a+c /b = (-5+6)/3 + (3+6)/-5 = 1/3 - 9/5 = (5-27)/15 = -22/15

Answer 2

Answer:

b)ab=3×(-5)= -15

(ab)^2=(-15)^2=225

ac=3×6=18

(ab)^2-ac=225-18=207

c) b/a= -5/3

c/b=6/-5= -6/5

b/a - c/b= -5/3 - (-6/5) = -5/3+6/5

$\frac{( - 5 \times 5) + (6 \times 3)}{5 \times 3} = \frac{ - 25 + 18}{15} = \frac{ - 7}{15}$

d) b+c= -5+6=1

(b+c)/a=1/3

a+c=3+6=9

( a+c)/b=9/-5= -9/5

(b+c)/a +( a+c) / b =1/3+(-9/5)

$\frac{5 - 27}{15} = \frac{ - 22}{15}$