What is the length of RP?
2 answers:
Answer:
RP = 8 units
Step-by-step explanation:
(x + x + 2) * (x + 2) = (4 + 6) *4
(2x + 2) * (x + 2) =10 * 4
2(x + 1)(x + 2) = 40
(x + 1)(x + 2) = 40/2
= x^2 + 2x + x + 2 = 20
= x^2 + 3x + 2 = 20
= x^2 + 3x - 18 = 0
= x^2 + 6x - 3x - 18 = 0
= x(x + 6) - 3(x + 6) = 0
= (x - 3)(x + 6) = 0
So x = 3, - 6
We know that the length can't be -ve because it's a dimension
So, x = 3
We know that RP = x + 2 + x
So RP = 3 + 2 + 3
= 8
Hope this helps, and please mark me brainliest if it does!
Answer:
RP = 14
Step-by-step explanation:
(whole secant) x (external part) = (whole secant) x (external part)
(x+x+2) * (x+2) = (4+6)*4
Combine like terms
(2x+2)(x+2)=10*4
2(x+1)(x+2) = 40
Divide by 2
(x+1)(x+2) = 20
FOIL
x^2+2x+x+2 = 20
x^2 +3x+2 =20
Subtract 20
x^2 +3x-18 = 0
Factor
(x +9) (x-6) = 0
Using the zero product property
x+9=0 x-6 =0
x= -9 x=6
Since the length cannot be negative
x=6
RP = x+2+x = 6+2+6 = 14
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