X² + 15x – 225 = 0tolong dibantu​

Jawaban:

X2+15X-225=0

X^2+15X-225=0

a = 1; b = 15; c = -225;

Δ = b2-4ac

Δ = 152-4·1·(-225)

Δ = 1125

X1=−b−Δ√2aX2=−b+Δ√2a

Δ−−√=1125−−−−√=225∗5−−−−−−√=225−−−√∗5√=155√

X1=−b−Δ√2a=−(15)−155√2∗1=−15−155√2

X2=−b+Δ√2a=−(15)+155√2∗1=−15+155√2