Question

(x+5)×(x+3) = 26cm²

work out the value of x

Answer 1

Step-by-step explanation:

(x+5)(x+3)= 26

x²+3x+5x+15=26

x²+8x+15-26=0

x²+8x-11=0

Answer 2

Answer:

X( x+3) +5(x+3) =26 cm^2

X^2 + 3x + 5x +15 =26

X^2 +8x = 26 - 15

X^2 + 8x - 11 =0

b^2 - 4ac = (8)^2 - 4(1)(-11)

= 64 + 44

= 108

X = - b +or - root b^2 - 4ac/2a

X = - 8 +root 108/2

X= - 8 +2 root 27 /2

Or X = - 8 - root 108 /2

X =-8 - 2 root 27/2