Answer:
The magnitude of the net electric field is:
![E_(net)=90.37\: N/c](https://img.qammunity.org/2022/formulas/physics/high-school/owwmnpuelrv1sd1r0f4yuvsa375w1ovz95.png)
Step-by-step explanation:
The electric field due to q1 is a vertical positive vector toward q1 (we will call it E1).
On the other hand, the electric field due to q2 is a horizontal positive vector toward q2(We will call it E2).
Knowing this, the magnitude of the net electric field will be the E1 + E2.
Let's find first E1 and E2.
The electric field equation is given by:
![|E_(1)|=k(|q_(1)|)/(d_(1)^(2))](https://img.qammunity.org/2022/formulas/physics/high-school/t840i44g2j7w8os9s2kpyvr73clz53gy60.png)
Where:
- k is the Coulomb constant (k = 9*10^{9} Nm²/C²)
- q1 is the first charge
- d1 is the distance from q1 to P
![|E_(1)|=(9*10^(9))(|-2.60*10^(-9)|)/(0.538^(2))](https://img.qammunity.org/2022/formulas/physics/high-school/izqu1znfkqjo3zur2iglkiulbcohq04t5z.png)
![|E_(1)|=80.84\: N/C](https://img.qammunity.org/2022/formulas/physics/high-school/aaxzomu6h2qowam3bq5ynhxc3thtarz62r.png)
And E2 will be:
![|E_(2)|=k\frac{d_(2){2}}](https://img.qammunity.org/2022/formulas/physics/high-school/vu3g5n59gizrgxr9hukdhygw4lpzt72bkf.png)
![|E_(2)|=(9*10^(9))(|-8.30*10^(-9)|)/(1.36^(2))](https://img.qammunity.org/2022/formulas/physics/high-school/jqs50vvmlcgh6p04l10ipq1krb7pgp26up.png)
![|E_(2)|=40.39\: N/C](https://img.qammunity.org/2022/formulas/physics/high-school/krauodk2axzil9knskajot8jd2mdx4i5c5.png)
Finally, we need to use the Pythagoras theorem to find the magnitude of the net electric field.
![E_(net)=\sqrt{E_(1)^(2)+E_(2)^(2)}](https://img.qammunity.org/2022/formulas/physics/high-school/89k43wddvq5ba1v4apii9eggzhevz4b3q0.png)
![E_(net)=\sqrt{80.84^(2)+40.39^(2)}](https://img.qammunity.org/2022/formulas/physics/high-school/99suxol5zze7ndgw2wel0z5w4on0yr7gic.png)
![E_(net)=90.37\: N/c](https://img.qammunity.org/2022/formulas/physics/high-school/owwmnpuelrv1sd1r0f4yuvsa375w1ovz95.png)
I hope it helps you!