Question

factorise the following x square - 16 X + 28​

Answer 1

Answer:

+16x+28=0

We add all the numbers together, and all the variables

x^2+16x+28=0

a = 1; b = 16; c = +28;

Δ = b2-4ac

Δ = 162-4·1·28

Δ = 144

The delta value is higher than zero, so the equation has two solutions

We use following formulas to calculate our solutions:

x1=−b−Δ√2ax2=−b+Δ√2a

Δ−−√=144−−−√=12

x1=−b−Δ√2a=−(16)−122∗1=−282=−14

x2=−b+Δ√2a=−(16)+122∗1=−42=−2