How to factor trinomial?

(x+5)(x+9)

Step-by-step explanation:

x^2+14x+45

We first find two numbers whose product is +45 and whose sum is 14.the two numbers are 9 and 5.we then remove +14x from the equation and replace it with +9x+5x

x^2+9x+5x+45

On factorising we get

x(x+9)+5(x+9)

We then factor out (x+9) again

(x+5)(x+9)

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

(x, y)→(x − 8, y − 7)

step-by-step explanation:

enjoy!