Question

Solve the following quadratic equations by extracting square roots
1. x2 = 100
2. r2-144= 0
3. (k + 7)2 = 289
4. (s – 4)2-169 = 0
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Answer 1

Step-by-step explanation:

x2=100

X =√100

X= +10 or X= -10

r2=144

r=√144

r=12 or r=-12

k+7= √289

k+7=17 or k+7=-17

k=17-7 or k=-17-7

=10 or =-14

s-4 = √169

s-4= 13 or s-4 = -13

s=13+4 Or s=-13+4

=17 or =-9