Answer:
12.292 or 1.708
Step-by-step explanation:
1#60 - (2 • (x + 7)2 + 4) = 0
2# -2x2 - 28x - 42 = -2 • (x2 + 14x + 21)
3#x2 + 14x + 21 = -2 • (x2 + 14x + 21) = 0
[tex]\\ \sf\longmapsto -60=2(h+7)^2+4[/tex]
[tex]\\ \sf\longmapsto 2(h^2+14h+49)=-64[/tex]
[tex]\\ \sf\longmapsto h^2+14h+49=-66[/tex]
[tex]\\ \sf\longmapsto h^2+14h+115=0[/tex]
