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1.) 4x² - 49y²
(2 ² )x ² - (7 ² )y ²
(2x-7y) ²
2) y²+12y+32
a=1, b=12, c=32
p×q=32 p+q=12
p=8 , q=4
y ² +12y+32
y ² +8y+4y+32
y(y+8)+4(y+8)
(y+4)(y+8)