Question

DOON PUBLIC SCHOOL, PASCI
SUMMER VACATION HOLIDAY'S
CLASS-9
MATHEMATICS
Ch1,2 NUMBER SYSTEM AND POLYNOMI,
1. If x + y = 12 and xy = 32, Find the value of x² + y².​

Answer 1

sorry but am not from doon public school pasci am from doon public schol panchkula

Answer 2

Answer:

given =.x+y = 12

xy=32

find $x^{2}+y^{2}=?$

x+y = 12 (squaring on both side)

$x^{2}+y^{2}+ 2xy = 144 \\ x^{2}+y^{2}+2×32 = 144 \\ x^{2}+y^{2}=.144-2×32 \\ x^{2}+y^{2}=80$