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Question

Solve the simultaneous equation
P^2-Q^2=40
Q+P=10
Using the substitution method

8 years ago

Answers

Steve
Q = 10-P

so,

P^2-Q^2 = 40
P^2-(10-P)^2 = 40
20P-100 = 40
20P = 140
P = 7
So, Q = 3

check: 7^2-3^2 = 49-9 = 40
8 years ago
Zulaiykherh
Thanks for your support steve
8 years ago

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